Excellent presentation, love the battle music. The battles themselves are not as strong, there's not any variety to the enemies or shooting, though I did appreciate being able to hold the mouse button to continue firing.
Once I got the explosion ability I could pretty much just tap right mouse to beat all the enemies with little risk. The jump mechanic seemed buggy, it didn't seem to always trigger when I wanted, leading to me landing under the bed, while I assume I was supposed to land on top. The ending scene still triggered properly, so no harm I guess.