Decent prototype for a surviorslike! I think my hi score was 100 and something.
I feel like the camera could be a bit zoomed out, so there's a bit more breathing room.
Similarly, and maybe this is just a preference, but I would have liked it if when the player moves in a direction, the camera leads in the direction they're headed rather than showing more of the screen behind them.
Both of these things would help with the feeling of being overwhelmed by enemies later on. I also think the challenge could ramp up a bit quicker also, and the diamond spawn rate could be increased to make it a bit more action packed. All in all a good start, congrats on getting the game done!!