I really like the jump sound and the visuals — the animation is great. The moving background works really well and gives a strong sense that you’re actually running. The game is fun, especially with the escalating difficulty that keeps it challenging.
One thing I noticed is that you have to check your score while you’re playing to know how well you’ve done, since it isn’t shown on the restart screen. It would be great to see your final score there, and even have a high score feature.
I also like how you can duck and then immediately jump, and how the duck lasts about as long as a jump — it feels responsive and satisfying. I think it would be really cool if the game had more variation in the terrain, like a mud run with slopes and different obstacles. Right now, it feels like a typical auto-runner, but adding that extra depth could make it stand out more. Well done!