it's fun, at first. that's for sure, just... after you get rockster, things get boring. it's just upgrading, and maybe clicking. sure, you start from scratch every rebirth, but your towers and unlocks don't reset. i know this can be frustrating, but you wouldn't *lose* them, in a sense as like, gone forever, moreso having to buy them back. i'd say that would make it more fun, but, i don't know. i'm not the best person to be giving advice.