A new week has dawned, and with it comes a new list of great things happening on Android. This is the Google Play App Roundup where we tell you what needs to be on your phone or tablet right now. Just click the links to head to Google Play and grab these apps for yourself.

Just because you're a grown-up doesn't mean you can't chill out with a coloring book and some markers. Adult coloring books are a big deal these days with mental health experts citing them as a great way to relieve stress. There's also a way to get your coloring fix digitally with Pigment. This app includes hundreds of free pages to color, plus a ton more if you subscribe.

Adult coloring books tend to have vastly more detail than the ones intended for kids, and it's the same way with the pages in this app. They come in various categories like animals, fantasy, and geometric. The default settings make it pretty easy to get up and doodling right away. There are plenty of color palettes to choose from, and you have several different brushes. These also come with distinctive textures. For example, the paintbrush has rougher strokes than the marker, and the airbrush is completely uniform. Each one has configurable size and transparency too.

When you tap in an area to start coloring, the app will keep you inside the lines. This lets you be a little more free with the way you apply brush strokes without getting a mess. You can turn this off. But you need to be pretty careful—a capacitive touch screen isn't the most accurate input device. At the very least you'll need a stylus with a fine tip to go completely free-hand. It's certainly doable, though.

The images have a lot of little nooks and crannies to be colored, so you'll have to zoom in with multitouch to get them all. You can also pan across images with a two-finger drag gesture. The pages have very high detail in general. Even zooming way in, the lines are still rendered smoothly.

Pigment lets you just fill things in solid if you want. However, it also includes the tools to create some very pretty works of art. You can layer colors on top of each other with different brushes and weight to create some very neat effects. All your work will be saved in the app, allowing you to come back to a partially finished page later or export something you previously finished. Exported images have watermarks, though.

There are around 300 free pages in Pigment, but upgrading to premium gets you thousands more. That also adds more color palettes and removes watermarks. This is a subscription app, so you pay monthly for access. The developers say that more pages will be added every week as a justification for the subscription. It's a little spendy at $7.99 per month. If you're really into coloring, maybe you'll be down with that. Otherwise, the free content it pretty cool too.

There is an ancient sea creature to be defeated, and it's up to you to defeat it once and for all. Oceanhorn (also the name of the monster) is a 3D RPG that has a very "Zelda" vibe. I think it can best be described as a maritime take on The Legend of Zelda.

In Oceanhorn, the main character wakes one day to find his father has left to do battle with the eponymous monster. You decide to follow in his footsteps and venture out into the Uncharted Seas, a region with many small islands that was once home to the ancient kingdom of Arcadia. Oceanhorn is one of the monsters responsible for destroying Arcadia. I don't usually go into so much background detail on a game, but Oceanhorn actually has a coherent and compelling story. That's nice to see in a mobile game.

The controls are simple, but also a little annoying. You can move by dragging anywhere on the screen. That acts as a thumbstick, but I really wish there was a way to turn up the sensitivity. I feel like I have to drag so far to move at full speed. On the right side are your action buttons for shield, sword attack, bombs, use, and so on. I have not complaint about these.

Each island has a maze-like layout, often broken up into sections that have to be unlocked by finding keys and solving puzzles. The puzzles aren't too difficult, although they sometimes require you to run around to different islands. Speaking of the different islands, one of the big parts of Oceanhorn is finding the locations of all the islands in the Uncharted Seas. When you go to your boat, you can open the map to choose a destination. The trip to another island is essentially a little minigame with debris and enemies that you have to shoot to clear the way.

The visuals in Oceanhorn are spectacular. It's clear the developers spent a lot of time polishing the graphics. The water has incredible reflections and realistic animations, and all the land textures are super-sharp. There's also no hint of aliasing anyplace. The very clean, almost cel shaded look really works with the "blocky" island layouts. The soundtrack is also wonderful.

Oceanhorn feels a cut above most mobile games, and you can try it for free. The first island and "training" mission are free to play. After that, you have to unlock the full game with an in-app purchase. It's $5.49 right now, but apparently that's a sale price. There are about 10 hours of gameplay in Oceanhorn, so it's a solid buy for fans of RPGs.

Looking to relive the good old days of PC gaming? RollerCoaster Tycoon Classic has come to Android with all the content from RCT 1 and 2 on the PC, and it can be yours for one low price (mostly). The good news is this game is still as engaging as it was in the past. The bad news is it's still going to eat up hours of your life.

RollerCoaster Tycoon Classic includes a whopping 95 different scenarios based around building theme parks. Most of the scenarios give you between one and five in-game years to hit a certain number of visitors, park value, ratings, or some combination of those. To do it, you'll need to run all aspects of the park from building rides to making sure the paths are kept neat and tidy. If you can't keep your guests happy, your park will be in the red before you know it.

The game is played in a top-down isometric view with all the classic menus intact. When you tap on a ride, customer, or employee, you get a floating info box. These can be moved around as you continue fiddling with your park, but the UI quickly gets cluttered on non-tablet devices. Zooming is accomplished with multitouch gestures, but there are only a few zoom levels. Likewise, rotation is limited to the cardinal directions. That can make it a little tough to tap on the right square sometimes, but it's usually not bad.

In each scenario, you start with some cash and a subset of ride types available. More will be unlocked over time, so make sure you keep checking. Some rides are single items that are always the same, but others (like roller coasters) have multiple designs available. You can also make your own custom designs, but this can be rather annoying with the touch controls. Prices are set for each attraction individually, so you have to keep an eye on how customers like it. Ideally, you want the price just high enough that people are always queued up for it, but not so high that you are wasting capacity with empty seats.

You also have to manage your staff in RollerCoaster Tycoon Classic. That includes handymen who water the plants, sweep up trash, and mow the grass. Then there are security guards who prevent vandalism in your park. It's a good idea to set your employees up on routes that ensure every area is properly covered. If guests notice too much trash or vandalism, your numbers will go down. The way your park looks is important too. Good scenery makes guests happy, and that means more income. There are a lot of little things to keep you busy while you save up for your next big expansion.

The $5.99 purchase price gets you the entire base game. There are also a few expansion packs that you can buy, but that's it. There's no pay-to-win scheme here. The gameplay is as it was in the original game.