You're absolutely right, especially about the space! I wasn't sure to make the assets smaller because it was my first itch.io game and didn't know if the web version scales the game down...
Well.. I'm still happy, because it didn't matter much for this version imho (since there's no "death" ). However, if I'll be able to continue working on this game, I definitely will need to change the scale of everything, especially sheeps.
Thank you for your comment! :)