Congrats on the submission! It's a full working game with a web build and everything, which isn't exactly trivial to pull off!
Maybe it's not the best strategy, but the laziest one seems to be to just chill on the left side, not moving at all, wait for some blocks to stack up and time a launch when the skybear comes near. You might get hit, but you'll probably outpace the enemy easily if you're accurate with your launches.