I like the idea and the execution is pretty good. The audio and music are good, and I love the art. I found a few bugs:
- Having a second copy of "green cards get +1" adds one to the numbers displayed on green cards but does not affect scoring.
- Player Gems counter does not decrease when a gem is removed.
- "Green with gray pair" and similar items don't seem to work.
- Items are kept after winning the game and restarting.
I would like to play more levels after level 4, because this was really fun.