Classic concept! Here are a few suggestions to improve it:

1. Add music and sounds.

2. Use a different font than arial. 

3. Make it so you can still see the characters, even if they are in the goal.

4. Mirror it vertically AND horizontally.

I hope the feedback helped you, it would be nice if you could check out my submission too. :)

Classic concept but nice iteration!

Nice idea! It's not very funny yet, but...