Hey there buddy! It's a pretty cute game you've got there! As someone has already said, it would work a lot better on mobile indeed , You could perhaps make a mobile and desktop version separately? (arrows for desktop and tapping for mobile). Also, got a small question: How do you add a video thumbnail for your game? Do you just upload it in the "Screens" section on the Edit page?
Chrome: https://chrome.google.com/webstore/detail/free-games/gechcfjojodafcpggkekfkkfpjacenno
Opera: https://addons.opera.com/it/extensions/details/free-games-2/
Click and Play!