Yeah, I understand how that can be frustrating, but it was an intentional choice to maintain difficulty in the game while not making the movement feel unrealistic (especially when running & energy drinks). I mentioned in another comment that I had plans for some other movement types that would have increased the speed, but I didn't have time to do those and implement the additional enemies that would've been needed to balance.
Cheers. I checked your game out and rated it. Nice job!