Hey! Interesting game - I thought the graphics/artstyle worked really well, the menus were really good, the small cut scenes added a nice touch and it felt like a decently polished game. For me, it needed some more gameplay; for example if the levels were some sort of puzzle rather than just collecting gems. Also the camera felt a bit off at times, would have been nice to have the player always centred.
Overall I liked it a lot, and for your first game jam entry, I think you did a great job :)