A bit tough when you don't know what your collision circle is. It feels like it's a bit bigger than it should.
A nice touhou-like. I like the idea of many different attack types on paper, but in reality - I dunno, you're already dealing with so much stuff on screen - it's hard to switch weapons or even focus on where the other end of the portal leads.
Needs a lot of visual polish. Summoning circle not moving along with the floating up-down animation of the first boss sprite is a tiny bit annoying. Enemies not having death animations (or attack animations for bosses) is a bit... I dunno, feels off. Definitely needs music.
Also - I'm not the biggest fan of just starting with the boss without any prior enemies (like with the vampire girl), I do want a bit of warmup.
Other than that - it works. Curious to see where this goes. Keep it up!