Thank you!
1. The controls are a mess, I agree. I thought I set it to both arrows and WD but it turns out the arrows don't work in this version.
2. The invincibility blinking idea is good - I'll hopefully have the time to put that in and didn't even think of it at the time.
3. Yeah, the pause menu is all kinds of messed up. I just stole it from another scene so ESC could pause, but none of the buttons do anything except crash the game, and to exit you have to ALT+F4
4. Honestly for respawns I just wanted the game to be however people wanted to play it. I did implement that some of the health came back after respawning, but enemies did not, allowing any killable enemy to be gone forever to make the game easier.
The ghost placement was a mistake for the most part, I agree. Most times I tested the game myself I would respawn the entire game because I'd be debugging and just spawn wherever I wanted, thus I never experienced that ghost issue - I'll try and figure something out for them (or just make them able to be jumped on so they can be avoided more easily).
Thank you again for all this! This was very much helpful.