I'm sorry to hear that. The fact that the levels have no boundaries is one of the biggest complains I got for my game, and it's my bad for having missed that. About the performance I think it's the fact that I accidentally exported as a debug build and some people noticed and commented that it can make the performance worse. If I ever revisit this project I'll update it by fixing everything that has been criticized about it, so thank you a lot for your feedback :D