Thank you for the feedback! No, you don't have to type any word, you just press one key (any key you want, or you can also use left or right mouse click) at a time, and the wizard will throw the farthest right food item. If a dragon is underneath the cart ( dragon is highlighted in pale yellow + some black lines around it), it will eat the food. To avoid mistakes, the food has to match the dragon type or color.
This game was also made for another jam at the same time, the constraint was: "game playable with only one button/key", so it was probably easier to understand in that context. I also added the controls explanation on the game page, but as stated in other comments, I wish I was a bit clearer on what the player is supposed to do.
If you don't mind, could you tell me why you thought you had to type a word?