This is a really great game! I really like the concept of all the enemies also being on a timer, which both makes it more challenging by requiring you to steal time from the enemies before they die while also making it easier by not requiring you to kill all the enemies, just getting them low is enough. The minimap was a very helpful addition as well!
I did notice that movement seemed to be the most important part, with some of my runs dying just because I couldn't move fast enough. The witch character I think is the most powerful because she can fly over pits which allows for much faster traversal through rooms.
Even with that, I still had a great time playing this! Great work with your game!