I liked the concept.
However I feel there is almost no need to buy the other vacuums as it's fast to get to 300$, and it is a bit hard to die as you can buy lives for a cheap amount (which I do not mind).
I would like if you could buy more than one per vacuum as well, as seeing them speed killing the bugs would be fun.
There is a bug where the shop menu only stops the currently spawned entities, so anything that spawns after opening the shop will keep moving.
Regardless, it was quite fun! Congrats! I've left my rating!