I never had a gaming experience ruined by a checkpoint system before.

I should actually call it a teleport system, because when you die you don't restart the level from the last checkpoint, you just teleport back with the enemies you killed staying dead. This means that difficulty is irrelevant since you can just brute force your way forward. They tried to mitigate this by implementing a score system that penalizes deaths but that is only relevant if you care about scores, which I do not. This all wouldn't be a problem if they included an option to play with them on or not.

Everything else about the game is pretty solid but I completely lost my desire to play after this.