It's really hard to manage your weight when you also have to be careful about your position with a player slippery like that. Seriously: It's horrible. Even if you want to do a rage game, that it's too much: maybe try to make it more responsive to the player, or maybe add a boost on one side... Otherwise your players will just quit the game in rage and frustration, thinking that the game wasn't fair with them, and never coming back....
Also, form what i can see there isn't displayed anywhere how much weight are you carrying, and that's not good, the player NEEDS that information in order to play the game (for similar reasons as the one i said before): Think about it making an UI that shows you how much you have in the inventory, and give some feedback when you reached the limit capacity, because in the game there was no feedback about that currently
Last, the score (i original thought it was displaying how much weight you was carrying, then later discovered it was a score), move it to the side, because on the center like that is just weird, and give it some context: for the player that it's just an arbitrary number on the screen that the player doesn't know anything about, and doesn't know what to do with it