That was fun! The control is a bit janky at times, but finding and catching the greebles was quite satisfying. The art is proficient, the character design is charming, and the soundtrack is fun. The ending was sweet!
The music seems a bit quiet compared to the sound effects.
The "greeble appearance" sound can stack on top of itself and become louder than normal. This is best demonstrated when entering the basement with the five greebles.
All-in-all, great work!