The Graphics are crisp, controlls feel good. I like the Rogue-Like Elements and the Upgrade System by leaving enemies alive.
But the game lacks a bit in the conveiance department for me. I did not know what each upgrade does - or if I wouldn't have read the Page, I would not even have known that they exist (or that I get damaged when clearing the room - or not clear it.)
Soundeffects would also greatly increase the enjoyment to "Love" the sh*t out of your enemies ;)