The core idea and implementation I really like. Being able to select your evolution at any point once you have the crystal is really empowering. I liked it. Yes a reset button would be nice and yes I am sure you could achieve a lot more in terms of level design given time. This is a jam though and as a flavor and an expression of your ideas.... I like it a lot! If anyone saw the balloon coming and wasn't surprised and pleased... I'll eat my hat :)