There's a lot of questionable game design here, but overall I can't say much without the finished product. A lot of the design seems against the player, which is fine, but it crosses the point of feeling unfair.
Viewing post in Watch The Fuel jam comments
yeah, we didn't manage to implement much of the originally planned gameplay, so we tried to at least make the bossfight hard enough for players not to just to finish the game in 2 minutes and then it's over xD this was our first jam and stuff so sorry if the game design kinda sucks (we already presumed that, we were just wanting to get out some kind of finished game for the jam at this point)
*other than that, thanks for playing