Solid game with decent execution, and the art for the character is absolutely great. Though I'm always a little annoyed when a game only has one set of controls (my left arrow key sometimes doesn't register unless I press super hard); the ability to customize controls, or simply switch between certain presets, would always be nice to have.
For updates to this game, it's already really great, though it might be fun just to have the ability to alter the cheerleader to our liking (e.g.: skirt with no panties, top with no bra), or simply just have the option to unlock new attire that might be unconventional by beating harder levels—classic and/or reverse bunny suit(s), schoolgirl uniforms, lacy lingerie, fursuit pieces (paw gloves and shoes, mascot heads or ear headbands), meme outfits like virgin killer sweaters, etc...?
To that end, though, I can absolutely envision a sequel that takes this concept to its logical extreme in the far future—instead of just doing nine pre-defined poses and dodging "bad" squares, what if you could control each arm separately, but also each leg as well? Instead of an avoidance game (though you could probably still have elements of it there), what if the goal was to have the character mimic certain cheerleading poses as shown by an instructor (who also gets progressively more naked as you beat levels)? And yeah, while that would be a lot of work both in programming and artistry on a far grander scale, I can only imagine the possibilities where you're able to incorporate handstands, cartwheels, or even (jumping) splits and bends into the most unique routine possible. Though that might be something that's beyond the scope of pure 2D drawings; you'd probably have to go into the 3D space to get that kind of dynamism and fluidity.