The point of the game is to push the golden boxed letters to the top. To do that you need to remove letters by spelling words. Once you find a word to spell click on the letters you need in the proper order. Once clicked the words will highlight to show the have been selected. Once you have spelt the word right press the "SUBMIT WORD" button found in the middle left hand side of the screen. It also works if you double click the last letter. If the word is accepted the letters will be removed and will push everything under them up until full. Once you complete the level you will earn gold or bachelor's credits. Under your avatar found on the tor right hand side you will see a "Time Till Next Drop" arrow, once that allow fills up letters will appear on the top row and bump all letters under it down, if a golden letter falls off, its game over.
As you level up the game gets harder and harder to play. It will start by the "Time till next drop" timer speeding up. Then you will get worse letters like "Qu" "X" and "Z" more often making it hard to find words. At level 30 you will get a fourth column that you will need to bump up, and a fifth at level 60... how those people do it? I DON'T KNOW!