A classic incremental game—nothing to add, nothing to take away.
It would be better to have the rockets launch automatically rather than requiring a spacebar press; it’s counterintuitive and, frankly, annoying. Also, you should double both the costs and the earnings—getting 0.5 dollars feels a bit odd.
The visuals are simple; it’s clear that time was a bit short.
I really liked the mechanic for buying a rat, very original and funny! (especially as someone who made a game about a flying rat myself).
Well done!