It's pretty fun to start, but the gameplay loop gets pretty stale and the currencies are not balanced well. You will easily be able to beat the game without unlocking a lot of upgrades, and the endgame all currency multiplier upgrade is locked behind the biggest red currency upgrades in the game, making them completely redundant. Once you beat the game there is no endless mode so you have to watch the same cutscene over and over as you mindlessly grind 5 minute runs.