Good job on your first platformer. It's got some charm with its pixel-style animation. Here are some things I think could be improved upon.

• Consider updating the game's page. One aspect of game development is creating a page that encourages players to want to try your game. Adding a cover image, description, and screenshots can go a long way.
• In addition to sound effects, try adding background music to enhance immersion.
• While this is a game jam and incomplete games are expected, adding a starting screen and victory screen can make the game feel more polished.