Yo, I played this game, and I think it's promising!
Some of the controls feel oddly chosen, Run & Interact being the same key especially seems like an odd choice. It should be the same key as the dash imo, but it doesn't particularly matter since the dash completely invalidates sprinting anyway.
I appreciate the amount of stamina given to the player though. It's very fun to use the dash and almost makes the game feel like a movement game. It could be fun to have expand on this aspect of the gameplay loop, for example a mechanic where you swap out the dash for other types of movement like a sprint instead; or even something more SCP-themed.
610 was adapted pretty well! The obvious next thing you could do would be a similar thing with 354 - "The Red Pool", but it should also be a priority to have a diverse display of creatures in such an anomalous world. The thing SCP creatures excel at is interacting & synergizing with each other! Think about it, 173, 096, and 106 are as threatening as they are in most games because they cover all each others' weaknesses. It would be nice to see levels featuring much more entities at a time, especially in a scenario like this.
The mouse being onscreen at all times is another thing I would remove unless there is something its needed for, it kinda confused me at first because I thought you would attack in the direction of the mouse.
I would definitely also tweak the projectile enemies; when standing completely still they aim above you and their tracking should not be as perfect as it is, especially when you're dashing. Also of course there is room for particle effects when they hit something and all that stuff.
This game runs into the problem that most SCPs on the wiki are isolated characters, and must be limited to NPCs or bosses (or roaming threats! Always nice to go back to those SCP horror roots) So the only options for normal enemies lore-wise would be SCPs that are species. That being said, here are my personal picks for good "species" SCPs that could work as recuring enemies:
3199 - "Humans, Refuted", 939 - "With Many Voices", 966 - "Sleep Killer", 1507 - "Pink Flamingos", 3035 - "Science Bugs", and as a challenge, 068 - "Wire Figure" (I've been trying to add this one to my own game because I really like the idea of it but have no idea how it could work). Also worth being said that 049 & 1048 can be the source of enemies as well. Others like 075 - "Corrosive Snail" and 312 - "Atmospheric Jellyfish" can also be inferred to be species; there is no canon after all, so really anything can be an enemy.
Anyway, good luck from another game dev! I had a good time playing this game and hope you can fulfill your vision! Also consider adding the "SCP:" prefix to your game's title; No particular reason I just like when SCP games do that.