Nice job on your entry. I liked the title screen and the music was nice.

Feedback:
The screen was kind of big in web build.
You could move faster than your bullets when walking and shooting.
I liked the controls on the screen, but felt they took up too much space. 
For play through I opted into using WASD
Art was alright for gameplay. 
The double jump needs to be clearer with some form of animation or indicator because it just looks like a high jump.
For the shoot it might be a better option to left mouse click. 
The first level should have been a tutorial that teaches you how to play the game
After you collect the key, I was confused that you had to press W to the person at the end in the booth.
Movement needs adjustments because it was floaty.
I liked the wall jump, but this definitely needs an explanation before performing it and an animation as well. 
Sometimes when you jump and you land on the side of a block, it pushes you back with great knock back. 
I couldn’t tell what the item for the key was and feel that should be made clearer.
There needs to be an animation for climbing up ladders.
The death animation/screen was real nice.

Overall, good work so far!