This was a great take on the theme. I like the concept a lot. I had fun playing it and believe I beat the boss (I shot him off the stage and the camera was tracked to him, but then I got the reset screen, so I'm not sure if I actually killed him, or the game registered me as dying), but I think I would have had an absolute blast if you had a little more time to work out some of the kinks and playtest some more.
Jumping seemed off. I could make it up platforms, but I felt like I was cheesing it and I wasn't actually solving the puzzle using the block or jumping correctly. Some small game juice would go a long way. Having the enemies explode or at least make a sound when they die would be nice. I wish I could have the two characters move a little further apart, or a lot further actually. And I enjoyed going around to suck up the ammo, but I don't know if it actually affected my ammo count. It seemed like I could shoot endlessly, and it doesn't look like I was able to take damage. I tried letting the enemies hit me, but nothing seemed to happen. Add some UI, that'd be great.
I'm sorry if that seems like a lot of criticism, it's only because I really liked my short time with the game and would love to play more with some of those things implemented. But for 48 hours, this was in my top 5 plays of the jam! Great work.