Hi MegaFuze, thanks for this big and kind comment!
The Deadline boss is kinda bad, because I implemented it in the last 30 minutes of the jam. The boss had another sprite initially but I replaced with the famous "deadline" text, because I thought it was funnier and more relatable. I didn't replaced the hitbox tho, it's my bad.
It's a great idea to animated grapple tiles, thanks ! But I think the main concern is that it's very hard to right click on a grapple tile. To check if the player can grapple to a tile, the game cast a ray from the player to the cursor. The cursor doesn't have to be exactly on the tile. Despite that it's still hard, so it may be better to cast 3 ray, 2 of them pointing outward.
Congratulation for completing the game, I hope it wasn't too frustating!