Hi! First of all really well made mod, i'm playing it probably since 0.2.0.
Anyways I've got few suggestions and few encountered bugs for you.
1.Ok so this one is pretty huge, I cannot advance further in the game on any save due to a glitch. Essentially if you save while wearing the Gas Mask, upon reloading game will treat you as you would be wearing Hazmat Suit. This causes the player to be unable to drop, pick up, or use any items. And since you don't have in most cases Hazmat Suit in inventory, you can't take it off. It essentially swaps Gas Mask mode to Hazmat Suit mode, for some reason. It's not something that was in clean 1.3.11 as far as I know.
2.I've seen that SCP-006 has 100% chance of spawning in the game. I would suggest bringing back old rarity chances, for overall balance. Godmode is pretty OP after all. Especially if you made SCP-005 easier to get now. Something that I suggested earlier too is that also if you would mind making this change, when it comes to SCP-006's achievement - it could only become available if seed has generated SCP-006's containement chamber. This would make achievement runs much more duable. I don't know if it is possible in Blitz3D but you might try it.
3. SCP-1079 is broken. Or atleast it appears to be. Eating one or 2 candies does nothing, only after eating about 5 after a short while you start loosing shit ton of blood. This is inconsistent with it's true abillity (if it's a feature).
4. Not all SCP-113's death messages change player's gender noun. Enough said.
5. Just a little thing you might want or might not want to consider, SCP-005's spawn rotation. It's pretty dope that you've kept all of its spawning locations at the same time as a tribute (I think it's pretty cool that you need to start crystallization upon yourself to retrieve it from SCP-409's chamber) but maybe rethink this a bit. While it's mostly balanced and all, for example when it spawns in its chamber, it doesn't really make sense that you would need to drop it in order to trigger "spooky event". Again, your choice.
Again, I'm aware this mod has still a pretty long way to go. So far, looking forward to the future