I really like the gameplay loop. Though, i do think having two blue fast ghost spawn at once is a bit impossible to deal with since you don't reload fast enough earlier on.
Otherwise, no complaints.
Yeah, the I was still balancing the procedural ghost & room generation even at the last hour... getting a bad combination on ghost powers early on can be rough. I think in hind sight I should have had the distance they can teleport grow as waves go on, so initially they teleport such a small distance they can't dodge the scythe, but it tips the player off that this particular room will be harder in later waves and these ghosts will need to be fought in narrow pathways to defeat them.