I used to play so many of those old flash upgrade games, super nostalgic. I liked it! Sound is good, plays well, I couldn't tell what the number was when jumping though, how much I was tilted when I landed? I wasn't sure if landing well was giving a speed boost or not. My only gripe was that I wish the camera showed more of what's in front relative to the player, would make it easier to jump over enemies. Great job overall!