Thanks for giving it a play! The power available in this game is the Modifiers.
When you are on the main menu, in the top right you will see the points you accumulated over all your plays, this will save to your local Pico-8 memory. Then, if you go to the Modifiers screen, you can spend those points to get benefits that slow down the snake's growth, meaning it has the power to achieve higher scores. These modifier levels also save. Hope that helps :)