Thank you for playing my game! Initially, I wanted to add a total of eight playable characters, half of which would need to be unlocked as the player progresses. Unfortunately, I did not have time to add that feature, as I have had a tight work schedule in the past week. Along with that feature, I wanted to make the locks on each door color-coated depending on the required key, to make it easier for the player.
Also, a little tip, if you let the spikes get you, you will just reappear at the start.