I did one Expert run, died between the miniboss and the boss. I like what's there.
The presentation is good, I like the animation of the enemies stealing from the trashbin. The game controls well, intuitively I tried to press ESC to Undo a couple of times, not sure if it's something which could be added.
The game is fun. I like the characters' abilities and the choice between two of these. The Tetris thing works too. The game seemed pretty well balanced, with the right lethality. I think the consequence in the next level for a character being defeated in the previous one is on point and the character progression feels right.
Based only on this demo a choice between a few extra characters at the start as well as more different enemies even during these first levels would be cool.
Depending on how progression between runs works (basically I prefer everything being available from the first run, especially regarding the content you're going to face, but probably when it comes to the player's own options too, for example the characters you can choose from) I might be personally more or less interested in the final game but that's on me, the game is cool either way, keep up the good work.