Hah great concept! Like some others said maybe using ASD JKL would be a bit safer (still breaking on French keyboards though :D), fortunately I have both Finnish and US keyboard layouts so I could play this properly. It took a couple of tries to understand the system recording two loops and my first couple of songs were a total mess (well my later ones were too, but a bit less :D). The rhythm game section worked well and the hit detection was pretty well adjusted and felt good to play. The sounds are great by themselves but I think baking some reverb into them (or using some at runtime) would make especially the drums sound a bit less harsh. Ah and the art is cute as well!
Final masterpiece: ``` {"notes":[[[2,3],[15,0],[16,3],[32,3],[47,0],[48,3],[64,3],[79,3],[80,0],[95,3],[110,3],[111,0],[126,3]],[[14,0],[49,1],[80,2],[96,1],[105,0],[125,1],[126,3],[127,4]],[[0,5],[34,4],[64,5],[72,2],[81,0],[95,1],[103,2]],[[13,5],[47,0],[62,1],[94,2],[109,3],[123,4]],[[3,2],[13,0],[39,0],[46,0],[62,1],[70,2],[86,4],[95,5],[107,4],[121,3]]],"scale":0} ```