The game is coming together really nicely, great job! I am going to try to answer these questions in as much depth as I can. This is not a criticism of your game, just a way to try to be helpful.
1. I survived around 44 seconds the first time because I was trying to pick up the arms with left mouse button and then I re-read and figured out it was with E. The second time I lasted until around 2 minutes because I just ran and avoided the enemies. I gave up because it felt like I could have kept avoiding enemies indefinitely. I think if you try to fight the enemies it is difficult to survive because the enemies swarm on you and back you into a corner. If you just avoid then it was fairly easy because you can jump really high and run fast.
2. I like that there were a lot of enemies that would spawn because it made it feel intense to have to avoid them all but when I first started the level the world felt sort of empty. I understand that this was probably to give the player a chance to get an arm without instantly dying but it's something to consider. Also, since the enemies would all just follow you, it was easy to lure them away since you are faster than them. So, if you were trying to collect a specific arm you could just lure them away and circle back. Instead of increasing the number of enemies you can experiment with their behaviors. Maybe when the player is out of reach some of them will go back to wandering around? If you wanted to make different enemies without having to make new art- you could use the same asset just give it a different color. You could also change the size of them- i.e. small robots are faster but easier to kill while bigger robots are slower but have more health.
3. I naturally wanted to click the left mouse for the left arm and the right mouse for the right arm. It was a little difficult to get used to having the right mouse switch them. I also kept wanting to click on arms to equip them. One thing you could try is having the active arm be whatever was last used. So the player could use the two mouse buttons for the two arms and whatever arm they last used would be the one that is accumulating damage. That way the player can switch between the two arms seamlessly. I'm not sure if this would work for your game or not, but it is something you can play around with. I think having dedicated buttons might not work because then you would have to have both hands on the keyboard and you wouldn't be able to use the mouse to aim. This could work if you had it auto-aim.
4. I liked being able to jump so high, that was really cool. I also liked how fast you could move. It felt smooth overall. The only exception was trying to pick up the arms. It was difficult stopping near the arm to pick it up. I had a lot of trouble with the controls at first. I kept clicking the right mouse button for the second arm. I never discarded arms because Q felt like a weird button to reach for. I constantly had my fingers on W/A/D so even pressing E felt awkward (at first) but eventually I got. At the beginning of the level this was fine because I could stop moving and pick up the arms but in the middle of the level it was really difficult to grab arms because you the pick up radius was so small you had to be really close to it. Since I ran away from enemies by running and jumping around, it was difficult to land near the arm just right. After I played a few times the controls got easier because I got used to them. I also didn't realize that your mouse was supposed to help you aim. I had my mouse by default near the platform so I just assumed the range of the arms was very small. Eventually I figured it out and the game was more fun because I was actually able to kill some of the enemies. Having that in the instructions or some kind of visual queue might be helpful.
5. I think the HUD made sense and I really liked the arm health display and how it would show which arm was active. I do wish it was bigger though because I didn't really look at it when I was busy fighting against the enemies. I did wish there was some way to see if the enemies got damaged. When I first played I didn't hit the enemies enough to kill them so I just decided to run away instead of fight them.
6. Everything was pretty easy to see. The grey stood out nicely against the orange/rust colors of the background so even though the arms were small it was easy to find them. I think the art style was cool and I think it did a nice job representing the environment your team planned for.
7. I didn't encounter any bugs. At first, one of the arms wasn't working so I thought that was a bug but it was just because I had the mouse pointed down towards the ground so I didn't see it working.
Overall, I think you all are doing a great job! This game has a lot of potential and I look forward to when it is finished.
-Breanna Flickinger