Cool mini shmup !
I like the character's design with his cool bike, and i like how the transformation sfx sorta feels like a nod the the transformers sound XD
There are 2 things i found a bit weird so i don't know if they're intentional or bugs,
at first i kinda skip past the boss (the large metal leg with the shoe) and the game kept going without any enemies spawning or second chance to see the boss so i reseted the game,
and then i don't know if you have only one level cause after the level clear i think i was just repeating the first level over and over.
Also i think i found an actual bug, after getting level clear on the first level, i'm not sure how i triggered this but the transformation no longer worked, the sprite showed the character on the bike, but the gameplay let you move as if you were in flight mode.
Other than what i mentioned i like it and had some fun, you definitively nailed the surreal secondary theme with those shoe tank and large robotic leg with a shoe for a boss :p