The game is decent and it's a well solid infinite side scrolling runner game. The sound effects for the player jump and get hurt feels nice. Maybe a little music can help to make the game better and not bland. You can put a tutorial on how to jump or duck as not everyone is fond on the controls, especially when it's a new game. They can think that the controls are using space button or maybe W and S. A little description on the controls wouldn't hurt too bad.
If I can complain anything about the game, it's just that the game is empty. Like, really empty. I know you put some coins, barrels, and cars that the player can interact with. Not because there's need more stuff in it, but rather there's very little encounter with those stuff. Really, I got over 150 points and only got 7 coins. How the hell can I get 50 coins to continue the game? And at those points, the game feels fast and you can easily get hurt if you're not careful. You can either slow down the speed when just reaching 100 points or give more obstacles and coins the player can encounter.
However, I see the game as a solid game. I'm wishing to see your improvement with your games and hoping you would get better. I like your graphics, simple and minimalistic. The cat is cute and smoll. Good job submitting it.