A really solid entry! And nice to see someone using BulletFury ;) I'd love some feedback on that if you've got some time!
Your game is a nice, polished little experience. I'm not actually all that great at shmups myself, so dying and having to do the tutorial again sucked - maybe you could use playerprefs to store whether or not the user has finished the tutorial?
You also really need some hit effects on the enemies - a white flash will do :P but it didn't feel like I was doing any damage to anything!
I think the art is absolutely spot on for a jam. Maybe a little bit of post processing (read: bloom) would make those white bullets pop - and maybe a couple of different bullet shapes and/or would go a long way too - that helps players pick out the different patterns. But those are really minor nitpicks! Overall it was a great little game and you should definitely be pleased with what you've done :)