I like it. But I'm not the best at tetris and the boss beat me... All the enemies were very easy though. The game mostly just needs a more unified art design and polish and you've got something going.
The tooltips flicker when first hovering over a character when choosing one.
I think you should be able to control the entire game with keys, now somethings need to be clicked like choosing a reward.
Needs a borderless fullscreen option. Also audio sliders.
Cannot resume game by pressing ESC again.
This looked odd, and couldn't buy it:

Some tooltips look off and cursor hides text:




















