Works on both Bluestacks and MSI App Player.
These controls are designed with US laptop keyboards in mind (specifically the MSI Stealth 15M - A11UEK). Experience may vary on desktop keyboards.
This repository comes with two .cnf (config) files.
One is for standard rhythm gameplay and has keys A through Enter mapped to the horizontal width of the screen. (A, S, D, F, G, H, J, K, L, ;, ', Enter)
And Space mapped for flick notes across all lanes. (there is minor input delay)
This one is titled "com.sega.ColorfulStage.en - RHYTHM.cfg".
The other is for first-person 3D events. You can use W, A, S, and D to walk, P to open the settings menu, F to screenshot, and the Up and Down arrow keys to zoom in/out, along with other misc controls.
This one is titled "com.sega.ColorfulStage.en - EVENT.cfg".
These controls work reasonably well enough for Hard and under rated charts, but don't expect to play anything past a like 18-20.