I was pretty confused at first just being dropped into it. As far as I could tell, the first screen at all in the game is an upgrade screen which is a little jarring? I also had no idea what was going on for the first 5ish min of me playing (i.e. I didn't realize that my character was auto attacking and all I had to do was move around and dodge - but I also haven't played vampire survivors so maybe thats on me haha!). But dodging the enemies was actually really really fun, so that kept me entertained enough until I figured out what was going on. I like the idea of the big boss thats both impossible to kill initially and basically one shots you, adds a bit of nice tension to the game. Overall, really enjoyed the experience! I think maybe some sort of extremely brief in game tutorial, or better visual indicators for your attacks or something would be good though!