I do wonder how I'm supposed to get inside the circle when it spawns inside a wall. It was alright though.

good idea

it's a good idea
but to make it a great game you'll have to make it... well ... noble.
it would be great to have:
- levels
- physics/acceleration
- specials (shields, health, bigger/smaller ball)
- nifty colors'n'grafics
- highscore-table

... do it now, and spend at least a month of work for it ;)
(given score should be a kind of... motivation)

good but put more effort.

It was good since you only made it in 3 days and It was kind of fun but I didnt like that theres no levels or highscore board. You could have put more effort in it and didint you say it only took you 3 days to compleate I think you could have made it better by working on it for longer. Your problem is that you ruched on this game. Anyways Great game and just wanted to say again put MORE EFFORT.

Three days, kinda wasted. :(

It's a waste of time moving the circle to the green one when it's just going to keep on moving, the X was stupid it never really came close to me, and the lins they were really easy to avoid; they just stood there. You have a good concept here except you diddn't spend much time on it, unless of course you got this idea and wanted to see what everyone esle thought of it. Than yeah I think this could go into the collections if you put enough effort, and time into it.

A few suggestions.

Speed things up.
Add more levels.
Add powerups.
Add more/moving enemies.