Nice game, literally fits the theme!
If you'd like a little feedback, I've got a few tips for improvement (at least from my point of view):
- buy and place enough boxes is a viable solution for every level. It would be nice to have also levels that cannot be solved by buying and placing a box :)
- Probably because previous point I had no need to buy keys and open chests.. tbh I finished the game without caring about chests at all
- a tricky thing (in a positive way) is that your lives don't restart by finishing level. But when you retry the level, they're number are reseted, you have 25 lives again so you can always finish the level by buying enough boxes. If you'd have constant number of lives for the whole game, I'm sure I would care more about what's in that chests and trying to complete level with as few live losses as possible
- and the last one - it takes too much time from touching a portal to actually let player know the level is finished. I understand it's probably intentional - you need to have a stable position to finish the level, but when the portal lays at the floor it feels like I missed something and the portal wont let me in.
The movement feels fine, I'd add also posibility of control by WASD - I personally prefer arrow keys but a lot of people are used to WASD. I'm always using both when it's possible. Other bunch of people, are used to use space for jumping, you cannot please everyone :)
I like the number of levels, making a reasonable amount of interesting levels drains me the most during game jams :)
I hope at least something from my feedback will help you with creating another cool puzzle platformers!