Literally. It is only going up and down
Yeah, we've been getting a few reports of that and are working on a patch. Currently the fix is to pause and return to the menu, then load again. All your points and upgrades and wins are saved automatically. The next upgrade will have a angle limiter on the velocity. Currently the ball is purely physics based.
Each time we update the browser version, it wipes people's saves, so we're waiting a bit for the number of daily plays to drop below 40 or so before rolling out a browser patch. The next update will contain a method of backing up your save, so we can avoid wiping prog read for people actually trying to win the game.