Good feeling with the inputs other than the camera, which has been mentioned before. Problem is that it's hard to tell exactly what to do. I collected all the keys I could find and looked around after weighing the buttons with the boxes, but I couldn't get the door open.

Cool 3D puzzle concept with responsive controls!

The controls felt nice, but the camera made navigating the level somewhat difficult. Without the instructions, it was hard to figure out the objective or how to collect the keys scattered around the map. Adding a key counter and making the movable boxes a different color would help players understand how to progress.

While the controls work fine, the restrictive camera makes it hard to look for the keys. Also, unless reading the instructions, it is not conveyed very well to the player how many keys there are or that the player must push the blocks onto the pressure plates to unlock the door.

It's hard to tell what to do from within the game; the only way to know that there are 4 keys, rather than 3 or 6, is reading the instructions. Movement was a bit slow without sprinting and the mouse was running into the screen edges the first time I played it.

I don't mind having the cubes look like the rest of the objects; I would recommend that they be put a bit further away, to make the player have to move them to get the keys (and thereby realize that they can be moved).

Everything works fine. The movement controls are a bit janky with not being able to jump and sprint, additionally the cursor prevents full turning movement if you don't do a trick using the windows key to properly lock it.

The physics objects could be colored in a way that makes it clearer that they are in fact physics objects that can be pushed.