Nice and very cute game, addicting gameplay loop and original theme, good music too, pretty balance of elements. Except zero story, but then this is the kind of game that doesn't really need story in the first place, just jump to shooting cute stuff with your Cyborg Corgi right away!
Didn't find any bugs, only problem that comes to mind was accidentally clicking on an upgrade right away when the lv. up window comes up, maybe have a "are you sure you want to pick this?" window when selecting an upgrade?