I enjoyed this quite a bit! Very charming, yet eerie little game. I like the animations for the monsters. The ones that slam on the glass are unsettling in the best way possible. The flying ones remind me of some depictions of moth-man, just a winged blob with eyes.
I noticed that once i got the double lazer upgrade, controls for the lazer became somewhat unintuitive. I think at that point it should switch from left/right arrow keys to up/down arrow keys, since the lazers don't really have a reason to pass over each other.
I'm downloading the steam demo as we speak. Looks delightful. Most likely going to get the full version soon!