So this is your first game on itch.io? Cool! Welcome to game development, WengerE22! Your game is fine, but if you want to improve it after the game jam is over, I suggest that you do the following:
-Respawn the portals whenever the player falls into the lava.
-Add a hitbox to the lava, so that it would send the player back to their previous spot instead of making them fall forever.
-Add an end screen saying "You win!" or something like that to congratulate the player for reaching the end.
Check out other people's games in this jam if you need further help. You can also check out my game, which is a platformer like yours.