core gameplay almost finished!

I already had movement, but I added a jump and a working level.
Most importantly, I added the most important feature of the game, being able to switch modes. Right now it’s represented by a flipped sprite2d but i’m going to add animations later.
The headstand mode gives you much faster movement at the cost of reliable controls, so the regular mode is the opposite.
Also the coolest part is that I added controller support and made a way for it to vibrate as well