Edit: I'm glad people are recognising that those are supposed top be glass shards on the ground 👍
Cards on the table, there are a fair amount of schoolboy errors in this project, not least - ahem - I accidentally gave the bigger monsters about a half second of i-frames... 😅😖
Those big guys that show up were intended to feel like Mr X had crashed the party, triggering the player's fight-or-flight response during the final push - they have 24 HP compared to the other monsters having between 7 and 9 - except those i-frames make choosing to stand your ground completely out of the question 😬
Or to put it another way, this is where I'm at 😅: