Nice game! So far the only bugs I found where 2:
1- It's possible to pick up a little more than the maximum by using scoop 3x3 over more than 1 trash in it's action radius, near the storage limit. This is due to gathering everything without checking space (it's ok, not an exploitable bug, therefore not game-breaking)
2- Clicking very fast near end-game. Since each collecting trash action triggers a noise event, clicking very fast overloads the max amount of simultaneous sounds, and makes the music disappear for a short moment. Try using a separate channel and/or impose a limit to the sounds effects.
Some recommendations: The garbage depot (or bin, however you call it), that shows the score, looks like a button in itself; transfer the shop button functionality to it. This is more of a personal taste though.