I was running out of time so I just used the main menu scene for the end game scene, the last button should be restart game. That is a great idea about giving more feed back for the evolution the only thing that happens at the moment is that the player animation is different and takes on some of the features of the enemy that was just defeated. Maybe I would add a sound or something more obvious. For the bubbles it is kind of a stretch but , the player bullets can knock the enemy bullets away , reducing your chance of getting hit . So the big bubble is able to clear away more bullets and goes through the walls , and the triple bullet is better for the bosses since it is effectively 3 hits in 1 shot. Thanks for playing and your feed back.