You've put out yet another fantastic game, Jonas.
Regarding the control glitches, I personally experienced them very little despite using Firefox, and I was able to work around them. More often than not, they saved me from crashing into something that I would have hit because of my own poor reflexes.
The story was excellent and compelling. The gameplay was very well done. The difficulty level was appropriate, and I like that the final stage was still hard as all get out, even with an ally and all the upgrades.
All in all, a well made game with an excellent message.