This was a fun puzzle game, I really had fun playing it. The last mechanic you introduced was a bit tricky for me to understand, do you keep the last 2 colours you’ve switched to, or is it something else?
Thanks for playing! The idea is that only certain colors can be stacked together at one time, if you pick up a different color than whats allowed for stacking, the new color replaces everything. There was a tip at the top left but as noted by other commenters it was hard to notice :)