Hey, nice work on your game, it hooked me for a while, by making me reach for a higher score. At first I thought the upgrades were saws I had to evade, but later I figured it out. It got really fast, is there a speed cap? The game could be very unplayable depending on the rate of spawn of the dynamites and on the player's speed, this partially happened to me when I was around the 7k score mark, it was really difficult to see the dynamites on the black background with that speed. the colors just kinda blended together. Maybe you could add a default jump height the character would reach with just the press of the button, and then if he held it longer, he would jump higher, instead of binding the amount he can jump directly to how much the player pressed the button.