That was pretty fun, I did enjoy it but there's a few things that I didn't like:
I think the biggest problem was the music. It's a complete tonal whiplash from the rest of the game. There's the destroyed city aesthetic outside but the music is your average platformer game music, I ended up just playing the hollow knight ost and that made the atmosphere feel better. I'm not saying you need christopher larkin levels of music, but just something that fits the theme more.
There's only two enemies and two bosses but I mean, that's completely fair for it being a game jam, it did feel kinda repetitive at times but it's impressive that it only felt 'kinda' repetitive. I do wish bert mother had attacks that required dash/double jump to dodge tho. The entire map design being done in the time frame is pretty crazy, especially for how big the map is and how well it connects.
The main thing that baffles me is how little the story was explored. From the video pitch, I thought finding out the lore about the box and the player feeling worse about their actions was going to be the main deal of the game, but there were only 3 npcs? And they don't even hate you? One of them even says "good luck!"???
I don't really have much to say about the controls because I was playing using the half-finished controller support (which worked surprisingly well)
The final mission essentially just being backtracking is really underwhelming, when the box guys said "you can return safely :)" I didn't think I would actually return safely. But I mean, again, game jam so that's fair.