This has easily been the best game out of the jam for me, spent a long time playing this, i eventually got stuck at the quadruple helicopter/turret bit in 2-3 - but i loved every second of playing this.
The music is awesome didn't get tired of it, the character controls feel super smooth and it was really enjoyable to move around.
The abilities and the fact you can die to leave a box/jump is just really creative - this felt like a really fun old school platformer, the helicopter and rocket upgrades reminded me of ratchet and clank, one of my faves from childhood.
Difficulty curve definitely went up in zone 2 - but also I don't usually play platformers so some of it is definitely a skill issue, which also just goes to show how awesome this game is 'cause it wouldn't usually be my jam but i was hooked!
My only critique i can think of is sometimes i wanted to like look up or i'd have my back against my wall and I couldn't see through myself.
Voice acting was solid, fun writing :D
Really really awesome job!