Hello! I really enjoyed what you got so far. Here's some thoughts:
1. Please add a map! you have very large sprawling rooms and its very easy to miss spots and get totally lost

2. environment  variety - each room looks very similar, maybe try  making each feel unique

3. Make the attack larger.  Its a very short radius and hard to avoid damage

4. add knockback to attacks - let enemies push back a bit, glow, etc when hit

Hello! Thank you for your feedback samthefireball!

There is actually already a map in the game. It's an ability to find. If you want to have a look at it, it's not so far from the beginning, on the 5th room to the right I think (a huge room).

For the variety of rooms, I thought of doing several biomes, each one having a significant number of rooms linked. For now, there are only two biomes (I don't know if you found it, there is a biome in which rooms are made of rocks) and you're right I will make more of those.  I thought of one made of or having lots of plants, and one with water in it, but that's still in progress and not definitive at all.

Concerning the range of the attack, I will do that thank you!

I will also add a knockback as you said thank you!

Thank you for your feedback. Soon the upgraded version ; ).