Amazing for your first project! I think you did a superb job at keeping the scope minimal for a first jam entry which is something a lot of first-timers don't get right (myself included!).
Platformers are tricky because they require solid controls to feel fun, but luckily you didn't fall into this trap either.
Not much for me to critique on here, other than I think the levels could benefit with having more visible on the screen at one point.
You definitely have a skill for this, keep making more!