If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Help Spiderman keep the city safe from Doc Ock by spelling words to climb buildings. Spidey will climb higher if you have spelled more words and thus preventing Doc Ock from attacking. There are also bonus tiles, and in the rooftop confrontation, you have to fill in the missing letter to form the word as fast as you can. Have fun!