I like this kind of games, its always nice to see some of them in a game jam. This one is quite fun to play through.
I liked the audio, but it gets a bit repetitive over time. Also for a jam game, I wished you could click a bit faster through the upgrades to experience more of the game without people clicking away.
One small thing I also felt was missing was an automated way to feed the hamsters. For start, its good that you have to drag food over them manually, but it might make sense to automate it in some way.
Overall, well done. I liked the graphics and the theme was applied in a good way. Good job :)