Hi, all!
Long time no see, but we’ve been busy bees working on the hardmode.
Hardmode can be unlocked even if you haven’t finished the game and will not affect previous progress. However, if you didn’t unlock a level on normal mode, it will not be available on hardmode. It can be toggled on/off from the main menu. When enabled, save points will be deactivated and you have to collect all the QBITs. Also, you need to finish the level in the required time, otherwise it will automatically restart.
Hope you enjoy both the challenge and the achievements!