Thank you so much for playing! I'm glad you liked it.
Yeah I decided to make the boss battles like that, originally they had 2 phases, but I realized I didn't have enough time to polish them on time so I had to cut a lot of content, including that. It's something I definitely want to improve If I go back to work in this game again.
Thanks for the screenshot, it's the first time I see that error, I'll do some research about it.