Kill21, don´t be so cruel please, jaja.
1- It´s true, is not on full-screen, but it´s a Kongregate uploader error or something, it´s always shows the game like that:S.
2 - True, game is on Spanish by default, but you can change it to Basque or English from "opciones" menu (options) (use "up arrow").
3 - You only have to press the "A" key (one player) once, and again, and again, and again...to have more speed/power, and push the opponent off the cliff (wich would be harder level after level)
 "AHHHHHHHHHHHHHHHH"){kind=icon}