Haha I did in fact mean LMB, I'll update that right now. Thank you for pointing that out and your comment as well.
Thank you for the compliments regarding the atmosphere. I will have some additional credits posted regarding some of the assets.
Your point about explaining the theme is valid. Originally it was a portal on the ground that the creatures would fall into. By the end, it became more of a door that they fell/went through and as to stay in the time limit, I left it as a door.
As for the creatures saved, that many didn't pass through, you're correct! Each creature has different values for when they escape the light (for example the short Plant Monster has a value of 4-6. I wanted to have some randomness in the game to add flavor - I was wanting them to represent creature families (one creature reps X number of creatures).
Congratulations on helping the critters!
Very astute observations, I appreciate you taking the time to write all of this!