This was a fun fangame to play, I really liked the idea with the effects mix and the maps were pretty!
I've seen that bugs could be reported here, so here's what I've found (take a coffee, it will be long but I've tried my best to find what I could so I'm hoping that it should be all):
- It is possible to disable the collision by pressing 1 when trying to exit a chair (Fairutsuki's Bedroom, Martin's House...), when using the bed, when using the elevators in Mall, when using the ladders in the bates (this one may also incorrectly set your sprite), and I'm probably missing more, but basically when you trigger an event that disable your collision.
- It is possible to cause issues by trying to wake up by pressing 9 while using a warp (the game wakes you up then use the warp, making you stay in the dream world while no longer being considered as in a dream, so you can be locked).
- It is possible to ignore the events placed below the player by pressing 1 or 9. From what I've seen in games like Yume Nikki to avoid this, the event is placed on the same level as the player as a player touch, disable your keys at the start of the script, move you to the event by disabling the collision to then do the script of the event, and then reenable your keys after doing it, so maybe doing something like that could help for these kind of key issues.
- The 1 key is not disabled in Fairutsuki's real computer, allowing you to open the menu after using it.
- It is possible to use the 1 key during the normal ending from the corridor part and everything after.
- It is possible to wake up during the "shadow corridor" of the secret ending and everything that occurs after (it's not a fatal issue since you can still do the ending by sleeping again, though it allows you to make a save while being considered as in the ending state.
- It is possible to sit down during the "cleaning part" of the secret ending and everything after.
- It is possible to use the 1 or 3 key to try to ignore the display of the ending sprite that is displayed when dropping your effects when it starts to be enabled.
- Pressing Shift in The Nexus while the effect animation is happening will let you keep the sprite of the effect, and doing it with the Speed effect may slow you down.
- It is possible to drop the effects directly where you are placed, so you can still use the doors after blocking them by dropping effects which doesn't seem to be intended in the ending part.
- Going back to hallways 2 from glitch transition will keep the pink tint of the screen (I'm not sure if it is intentional or not since you made a sound effect be played, though I figured out that it should still be reported).
- There is a lack of collision with these walls in hallways 2, allowing you to go out of bounds.
- There is a lack of collision with this part of the escalators in Mall, allowing you to get out of bounds too (also I've encountered a lock by trying to use the elevators from a wrong direction but I don't remember how, maybe the Set Move Route command should be altered to tick Skip if cannot move?).
- The warp leading back to bubbled water from the bates can be used from the sides while in the pool, allowing you to exit the map while being slow and redoing it will make you become even slower (setting a conditional branch: player is facing up should work as a fix for the warps). Related to this, being slowdown may make you walk through walls when attempting to use the ladders still in the bates.
- The ladders in the bates do not work correctly when trying to exit: if you go back just after using one of them, you will end up getting locked.
- The flower present in code maze cannot be used at all: the event is set as below the player (you need to be on the flower to use the warp by setting it like that), but you have placed manually a flower from the ChipSet over it, making it have a collision (this one is rather odd since the error seems way too specific to not be intentional, I'm still reporting it just in case).
- Using the peepholes in ventilators partially remove your effect (exiting the map will make you reuse the sprite of your effect while not having it enabled).
- It is possible to move while the Tutorial is used, and its picture is not displayed while in the Nexus (The event in the top left corner of the Nexus is a common event that deletes the picture 1 continuously: if you wanted to only run it once, use Erase Event at the end instead of End Event Processing).
Now those are not bugs, but rather issues that I've encountered while playing:
- I had troubles finding the lightbulb and pixel effects and only got them by checking through RPG Maker for their switches (sorry for this, but I had nothing else to do since I already visited the whole game outside of what was locked by getting all of the effects and the pixel effect): the issues that I have with these two are that the lightbulb is located in a dark area where similar objects on the ground are placed just before, making me thinking that it was another decorative element, while the pixel effect blends with the decor, having similar colours while just being a bit bigger than the rest. Maybe it could be possible to add an animation or make the lightbulb glow I guess?
- The escalators in mall are confusing since they don't have an animation, by more than one time I've used the wrong one and I'm not sure if it's what you wanted, so maybe an animation could be added if it makes sense? Your area reminded me of the one in Earthbound, maybe you could do something like it?
- The collisions in the computer in Fairutski's Room are confusing, the mouse sprite does not represent the actual placement and you need to "face" the icon to use it (you can interact by being above the icon for example). Maybe the icons should be set as below the player and the mouse sprite readjusted to match with what is displayed? And you mentioned that Shift can be used to exit but maybe X should also be added since it makes more sense gameplay wide and that it is not used there either.
- Finally, the fact that the crash event can only be escaped by having luck by talking to an NPC made me thought that there was no escape or that the event was incomplete or glitched. I'm not sure on what could be done for this one, maybe interacting with all of the NPCs?
I really enjoyed this game, sorry for the wall of text, and looking forward for what you plan to do next!