Paper Dash

You and your friend were bored in school during a math lesson. You borrowed him your notebook and he sketched out few funny obstacle courses for a small cube. He told you to pick up a cube and try to go through the whole set of tracks. Accept the challenge, and control the black cube, jump over all obstacles and spikes, collect all stars, and try to reach portal to the next level. Can you complete all levels of increasing difficulty? Have fun.