To get past the tutorial, I need to press space. However, pressing space does not work. You might want to check if the keybindings and code are ok. Also, the resolution of the hearts is distractingly poor. You might want to look for higher-quality sprites or make some yourself. Finally, to convince more people to play your game, try to get a screenshot of the gameplay to post as the thumbnail. It won't be the best, but it shouldn't be much work and it'll be far better than the blurry ground tile that is the current thumbnail. Hope this helps!