On level four theres a bug that wont let you pass a certain point of the level and you never get to pass on:
TubaDudeGaming,
Great idea, buggy and short term
This is a great idea for a simple game for people to play. However, there is a game breaking bug (it eventually literally breaks the game) where if you close out the game after an upgrade purchase but before you start the next round (and even sometimes at the very beginning of said round), you can upgrade without losing the money. It caps out at 25 and any purchase past that will literally break the game as you can’t play the game. Fixing these issues and making more unique levels will make this game more fun and long term for people.