Harmonix may be riding high on the success of its recently-funded Kickstarter campaign for Amplitude , but it seems its musical shooter Chroma isn't faring so well.

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The studio has sent a message to testers explaining that "substantial retooling" is needed in order to get the game in a position where it can be released to the wider world.“Based on the terrific feedback we got from all of you in the community, as well as our own analysis, we have concluded that Chroma will need some substantial retooling to be the game we want it to be,” it reads. “We remain passionately committed to the high-level vision, and we think there are some very successful mechanics and systems in the existing build. The team has, in fact, already started prototyping new directions for the game based on those successful mechanics. We look forward to sharing more with you down the line, as Chroma evolves in new directions.”Chroma is a musical first person-shooter Harmonix is co-developing with Hidden Path Entertainment, makers of Counter Strike: GO and Defense Grid. Chroma has all the trappings of any other FPS -- multiple classes, a primary and secondary weapon, score and time-based challenges -- but combines its warfare with beat-matching and rhythm requirements you’d normally expect from Rock Band.For much more on the game, check out our extensive write-up of our time with the title.

Luke Karmali is IGN's UK News Editor. You too can revel in mediocrity by following him on Twitter