First of all, congrats on your first Jam Entry. Cheers to many more in the future! :)
Funnily enough, we had a really similar idea for this theme. You need to draw spells in order to defeat enemies / danger.
Despite that, these are 2 drastically different games. I loved the idea of using constellations! :)
The tutorial feels a bit rushed but I imagine you were running out of time at the end.
Overall I enjoyed it, you come up with an interesting mechanic which definitely could be explored further! :)