Nice thinking and implementation! Loved the game generally.
The enemy AI is good enough to make the game feel enjoyable. Also backgroudn music is a fantastic choice, SFX are incredible too.
Even though you didn’t use any art assets, I think the particles, effects, and grid structure make this a really great piece of art.
Also the skill tree is an amazing bonus—it’s incredible that you managed to pull this off.
Overall, it’s a fantastic entry, keep up the good work!