This was fun to play. My feedback are on the sound , the background music and sound effects can be improved. Also the diamond 💎 when collected animates up, consider directing it to icon at the top left instead. And lastly, the platform was generating in front of the player, that should be looked into. Well done 

Fun game, I enjoyed running, dodging obstacles, and collecting gems. 

Some feedback:

I would have liked to see some unique additions to your game. Perhaps we could have:

1. Different types of penguins, each with their skills and abilities
2. Variety of powers-ups 
3. Different obstacles and enemies (what are penguins afraid of?)
4. A variety of environments (each with its own theme and unique enemies)

The game has the potential to morph into something great. A few modifications here and there will make a huge difference. Well done and thank you for your submission