I love how you have disguised a puzzle game into a roguelike :-D
The game stopped responding during the 3rd encounter after I defeated an enemy, I couldn't click anywhere anymore but the music and tooltips still worked, no idea what happened there.
- I felt that the basic enemy had a bit too much health, dragging the fight duration a bit.
- The other enemies were really nice and creative, I lived the poison one
- The buttons on he sides of the grid were a bit small but I worked it out
For me, it could be released almost as is, so amazing job!