Okay just reporting a miner bug.
Beware! Spoilage ahoy!
Now that I have finished the game and seen the ending, though didn't take the option of finding out what has happened to jack, I cannot buy anymore jerks, I've clicked on the jerk cans, I have over 6000 space rings, and nothing is happening, yet if the Derek's stats go as nuts in the later battles as I expect they will I will probably need more jerks as well as upgrading power.
Am I missing something? or is this a bug, since there is no explanation, and if it is intended to stop players buying more jerks, then why does the final dungeon turn up whe it does?
I hope that I am missing something and that this isn't broken, especially because I rather enjoy seeing what new jerks turn up, and now that makes space rings yet another useless resource.b