I like the concept of the reality glasses, and I wished they were used for more than just a "swap dimensions" button! Having to click them to swap and press E to shoot also seems fairly unintuitive.
The art's alright, but as not everyone's good at art, I'll let it slide. I like the two colors representing each dimension. Music's also good, but for some reason only plays on the white side.
The game could use a lot more mechanics and puzzle elements than just swapping to shoot ghosts and get keys. I'd also recommend not putting spikes or ghosts too close to the player's spawn point since it's really easy to run into them by accident.
Overall, a pretty good game. Would be a good candidate to expand upon and polish.