As a friend and someone who helped a little BTS, this is entirely objective.
- Basic Linear Formula - It's pretty much like a typical incremetal game, you gain stuff to prestige, then use that to gain even more stuff. It's sadly lacking content-wise, and while I know you've had many constraints, it still doesn't deny the fact that the game is just on the edge of completeness.
- Unrewarding Gameplay - For the first "half" of the game, you click a button to increase the density of an object, then you unlock Prestige and exchange your pressure for Prestige Cube, which buy helpful upgrades to reach Prestige more quickly. You also unlock Energy, a passively gained stat that boosts previous stat gains. However, all you do in the game is press two buttons and wait, and with no new content beyond Energy, the gameplay loop easily gets boring.
Overall, it's an interesting idea that just sadly wasn't expanded much on. It clearly shows pressure within the game, but I suppose external pressure (school and time constraints) really nailed this one in the coffin. You did great though for your first time with pure JS and time limits. As a friend, this would be 11/10, but objectively it's more like a 7/10. The idea is there - you just need to expand on it.