Tinker's offense is largely complete save for a persistent bug with the homing missile.  Next up is defense, which should be a matter of like 5 minutes.
Just for clarity, in case anyone is testing, on the keyboard, WASD for movement, T for Special, I for Shoot, P for swap.
Messed around a bit with the bosses.  Added Boss 3 art into the game, but haven't done anything with it yet.