Thanks for the positive review! Also level 6 is possible but you can easily soft lock yourself, didn't really get to make it play to other people before publishing and you're the 2nd person to say they didn't pass level 6, might've put it too early, if you wanna check out the other levels you can press "P" to go to the next level and "O" to go to the previous one, said this in the desc but not in the actual game tutorial.