Honestly - good effort for a first published game, with such a tight deadline no less.
I didn't really understand how to get a high score because it kept resetting to 100 and I couldn't figure out why. As for survival - it's extremely easy to just keep the ball in air with fast drags until your "energy" is depleted, then kite the players away and land somewhere safe to replenish/collect items. Even with this and the general lack of polish - the game would totally go hard if it were made during the Flash era