A game in a hospital is unique, well done. I agreed with juzek with font thought

Please choose different colors. The font is unreadable. My eyes are dyeing here:

The collisions make no sense with the background presented. Try to have it align to match the visual cues:

I couldn't get past the level where you find the book. I stepped in each available square, and pressed space, but the game did not progress.

It would be nice to include a button to close out of the window, so I don't have to use CTRL+ALT+DELETE

I entered a room once once and immediately got a "Game Over" I am guessing a spider spawned on me or something, but that wasn't a good moment.

The English is not very good.

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But all those are just technical bugs that I bet you already knew about. I want to focus on the game design mostly. 

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You should focus in on what you want this game to be.  Do you want it to be more a puzzle game? if so, have the spiders move in predictable paths, and have the fun parts of the game be in timing movement between them, or collecting gems in increasingly difficult to get to places. 

Do you want a psychological horror game about the player and their crazy friend? Then make what the player actions are, relate to the text more. Such as a fear of spiders, or ramping up paranoia, and make the consequences for being touched by a spider less severe.  Increase the amount of writing, and have the gameplay change in unexpected ways in-between the story elements. 

Do you want this to be an action / adventure escape game? let the player be able to fight back against the spiders!

Right now your game seems like a collection of actions that it is possible to do. Take those actions and turn them into a game!

Very simple and very fun! I enjoyed ^-^

The only wish is to restart a level instead of entire game after [Game Over] screen.

But i guess it will be on the next update (devlog says the game is almost finished).