Thank you for your kind words and for playing the game!!
For the ideas:
1. I wasn't aware of that! I should fix it. Thank you!
2. That one is intentional xD
3. Yeah I wanted to fine-tune the delays between the projectiles while still keeping them difficult to an extent, but never found the time to do it. Decided to just compensate with hearts the player can collect xD but yes! also something to work on in the future.
Thank you again. Idk if I will continue work on it but if I do I'll definitely keep these in mind :D