Good job mate. Love the randomly generated aspect. I would like to see more control with jumping, allowing you to jump at max height or just one block based on how long the jump key is held down. Or by pressing down, you quick descend. You might get stuck/blocked on one of the starting fence lines, occasionally random jumping (thought this was caused by "tripping" over a rock, but it happens on plain grass too).
Personally i would slow down the falling blocks(Will call it "Death Wave") for a few seconds and gradually increase it overtime matching how well the player is going. So, for example always keep the death wave at a max of 100 meters, allowing it to go to 120, but always lerp to 100. (So the player feels that they are making progress even though they are not). If player is at 60-120, make the death wave move very fast, at 40-60 meters moderately fast, 0-40 completely based on how fast the player is going. (Adjusts for slow player's, and the hardcore speed runners so everyone gets the exact same experience.)
Overall, you did very well. Good pacing, decent visuals and enjoyable gameplay.