Thank you for the great feedback! I learnt from my last game it's better to have slight "Checkpoints" in a game for it to be more fun! I do agree the game can be slow at times and thats mainly due to me not having all that much time for better level design. Im also rlly happy that you enjoyed the boss so much since its the first time I've ever made one and it definitely took the most time!
Glad you enjoyed the game!