I like it, but it is too easily broken with the Interest upgrade, which earns money far too quickly.
Also add more upgrades, more levels and some active mechanic and this is will be quite a good game.
Thanks for the feedback! I appreciate it.Yeah, I've a long way to go with balancing the upgrades and the enemies. This was the prototype, I'm currently rewriting it in a more suitable language now so I will bear that in mind.