Mobile friendly tap on where you want to go with ther blue square. if you are fast enought you damage the red squares. the faster you go the more damage. the bigger the red squares the slower they are nd the more hp they have. breaking squares gives you points. if your temporary score(blue bar below the green one) is higer than your hp(green bar) than you receve hp and reset your temporary score. your total score is above the hp bar. breaking the purple blocks gives you score points. after touching purple you get stunned until you dont klick/touch the screen. piking up hearts gives you hp. after you die you get you total points accounting for time, monsters you killed, blocks you broke and your score.
all by me nothing more, so have fun!