Awesome game! I personally am all for slippery movement. I love the strategy of getting hit twice in the beginning and just rushing through the rest of the game by circling round the enemies and tapping the direction toward the enemies and mashing shoot like this:
Keep in mind that all the bullets are going up, so all enemies died in one swoop here. But obviously this strategy has the unintended consequence of dying in one hit if you lose.
Well done