Thank you for trying. You will remain in my heart as the first person to reach level 3. The cube tilt might be caused by differences in FPS among players because during testing, the angle rotation was correct. However, upon checking now, I realized that the angle calculation is slightly off. If you want to progress, there's a little trick to mainly use Q and E for cube rotation.
About 2D:
Gravity keeps changing, so you need to keep an eye on the sparrow behind you.