I sincere apologize.
I didn't know you could use the mouse wheel. I was wondering what the blue bar on top was for, now I feel stupid. I think the reason I missed it was because the tutorial was too wordy and I was able to beat the tutorial without the upgrades.
So I played the game again, re rated it and I beat it so I now feel much better. So yeah, it in my earlier playthroughs, I played the entire game in the dark and it was very frustrating all because I missed the thing about the mouse wheel. I take back everything I said about the upgrades.
But still camera needs work though. And the scroll wheel only works when the mouse is on screen, otherwise it just scrolls the browser window up and down.
Great job!