Nice game! I like the inspiration you got from Game and Watch! The only things I feel I can suggest are:
- Add some music please! I would of love to try and get a really big high score with music included to motivate me!
- Edit the controls for the up and down movement. I like the idea you used the higher key as an up movement and the lower key as a down movement, but it kind of felt a bit uncomfortable for me. Might i suggest something like W to move the left paddle up and D for down and O for up for the right paddle and K for down?
Overall though, the game was nice! I hope this feedback helps you to polish the game and improve it!