Really nice little action game. I liked the level designs, good moving around, felt interesting to look at. The little green guys surprised me a few times.

I did find the enemies felt like they were a little bit difficult to get anywhere near without dying. Maybe a short invulnerable timer after getting injured by one would help not to lose all your life straight away? The boss battle was a very nice addition, I like his movements.

Great job!

 I liked the design of the dungeon/ruins. It kind of feels impossible to avoid the damage from the enemies but at least there are checkpoints. In the How To section it says Right Mouse Button when the left one is meant. I managed, on accident, to leave the bounds of the room. by walking into a corner. Good job!