Good job! I liked the visual style of your game, and the music fit it well. I wasn't able to finish it though, as I found the second level quite difficult. I didn't quite understand how to finish levels, nor what exactly made me lose stamina. The white coins didn't seem to do anything from what I could tell. Overall, making it more clear what worms or those white coins do to the player would help immensely, as well as explaining that pressing buttons is what loses stamina, not necessarily the act of moving. If you can help with the player's confusion, they can really start enjoying the game.
Well done! I hope you keep making games. :) I'm just starting out like you, and we should both know that the first step to becoming a good game developer is to make games.