I just wanted to let youn know about a small little "bug"
When you first get the double jump power-up/upgrade, if you are in the air you can do 2 more jumps causing you to pretty much do a "tripple jump". I'm not sure if this is intentional but I'm just letting you know
Thanks, but this is indeed intentional - taking damage or receiving an upgrade "gives you back" all of your jumps.
When taking damage this is so you are less likely to fall into a pit right away (if you're hurt above one), since taking damage stops your movement in the air.
Your air movement continues after the upgrade animation, but I felt the player might be confused after being briefly taken out of the flow of the game and also fall into something.
For similar reasons, both of those cases also make you immune to all damage for a moment.
Of course, many features like that are missing! A way to pause the game, for example, or to control the sound volume, like you said. The game was made for the B&W jam, and since the voting is still ongoing I cannot make any updates, but many of those little quality of life things will be added soon.