Took a look at it. Are you planning to add collision in the near future?
I suspect you mean collisions to destroy the player with the astroids.
Then yes, It's allready implemented.
Where theirs suppose to be walls. When I played it awhile ago, I could go through them then end up on the left or right side of the screen.
Certainly not,
Yes, the dropbox version has been updated quite a few times since "the walls"
where present.
Right now, if you move offscreen to either side you appear on the oposite side.
Only top and bottom have an actual "border" but that is just the screenborder.
I suggest you try it again
click the link in the top post, and if it loads the
old version, hit CTRL+F5 to refresh your browser cache.
P = pause/shop