I enjoyed that a lot, it's a very coherent game experience on all fronts, well done. I think it needs to get harder quicker. I like the element of strategy that emerges from how you can combine the powerups.
Thanks a lot for playing :) we had plans to add more difficulty to the game as the play time passes and add boss cards after a certain play time, but sadly ran out of time to create them. We'll work on that after the review period is over.
