As you might have guessed, the game doesn't have any strategies. Sure, you can heal your life if you manage to perform a healing action, but if the health drops below a certain point you automatically gain more health to never drop to zero. Basically, when the time is out, the game counts how many times you pressed an arrow key different from the previously pressed arrow key, and how many times you pressed space bar. Each level have a minimum number of arrow key presses and space bar presses, and if you have enough, you win. Otherwise the game tries to make it look like you're loosing all life and then kills you. And yes, the combos changes over the first levels to introduce more confusion.
The game is actually a joke, we wanted to create a game where a skilled player would fail but a four year old kid would win.