This was pretty awesome, deserved way more attention in the jam! Also I managed to defeat the boss. The sounds for collecting pickups I'm really not a fan of, I thought it was rather distracting. I think you mentioned in your video you are not too well versed in SFX design? I would reuse stock SFX and modify & combine them to fit your own needs rather then making from scratch if you did that. FX was pretty awesome, I think lacking screen-shake would be my only gripe, there is a mix of styles with it though it looks like the explosions are pixelated but the rest of the game isn't. I think the camera is zoomed in a little too much, I would have preferred if the entire game was either more overhead or zoomed out, though I get why you would want to show off that awesome mech model. The boss took sooo many hits even when upgraded, still felt satisfying to take them down! Would definitely want to see this as a full game.