Great game! i had a good time with it and thought the art and animation are beautiful. I like how the coins guide in most cases, but here are a couple places i thought were a bit unfair...
so because of the little spike dude down at the bottom right and the coin that is there it looks like you have to jump all the way over there, but there is a platform next to the dinosaur (idk ok) i would suggest putting some more coins guiding the player to make it a bit more obvious.
now this was kinda the worst bit because the coin makes it look like you have to jump there. But the coin is actually right above a spike. This felt pretty cheap when i jumped and landed on the spike. (it actually was kinda funny, but i still think you should remove it and add other guiding coins)
all and all good game though! The movement feels responsive and quick, and the artstyle is really nice.