Kind of a mess, but a decent amount of mechanics look good. Using the movement of lifting and lowering the gun as melee is both humorous and logical, and I liked how you used the same lift gun mechanic to ride that green wire. The titular hair mechanic is strange, but decently compelling to use. The movement options is when things start to feel crowded, with crouch jumping, grenade jumping, splat and launch, and gun bouncing. There's so many that I felt overwhelmed and found it hard to try and experiment with the options. Might help if there were obstacle courses that helped introduce those movement options so the player can get used to them.
Glitch(?): The tutorial said the brain dome guys were only killable with melee, but I killed him with grenades. That or I miss understood the sign and it meant the brain dudes only attack with melee.