- I agree with gem need a buff to serve as the goal of the game. Maybe a bit of story, or an ending, or maybe permanent buff for you next playthrough?
- Really need an option to "pass" turn, to avoid permanent stuck or some "sure hit" (like when 2 reds are diagonally next to you.
- Maybe show shop icon next to numbers in the TAB overlay?
- Maybe put the TAB word somewhere in game screen? I never "knew" about it since I just jumped immediately into the game.