UPDAAATEEEEEEEEEEEE

Human! You are about to become a sword robot! · By
Either:
Are you kidding? He quite literally infinitely expanded the game with Endless mode, redesigned the upgrade system, added an entirely new mechanic, and gave us Spider-tron 6000. What do you mean "didn't add anything"?
As for the "not taking ideas from the community", what do you expect for two weeks of exposure? The "suggestions" section is, as the name implies, for suggestions. I'm fairly new to coding, but I'd bet a lot of what in there (namely, new weapon ideas) would take a ton of re-coding, much less implementing.
I do my best to listen to the community!
The Feedback Form in the game has over 1500 responses, and a lot of them mentioned they wanted more levels and enemy types. Endless Mode also came up a lot, which definitely contributed to the direction of this update.
Many people also wanted a Sprint ability, which is why we now have a Jetpack.
If I had listened too closely you would have had a boring thing that just makes you run faster, rather than fly forward with special sword cuts. :)
You see, that pixel was a very important pixel. Being a part of your head, it probably stored vital circuitry, and it melting could (and, apparently did) cause a system shutdown.
While, in game terms, it can feel pretty ridiculous that you were doing so well, and you die from what seems like pretty minor damage, what else do you expect the developer to do? Just how many vital components should your robot be able to lose before they shut down?
Some things you can try:
Ah, sounds like you need to associate your itch.io account with the game!
Find your original purchase confirmation email and click the link in it. There you'll have an option to tie it to your account.
https://itch.io/t/46387/how-to-download-and-install-the-game