Select the amount of rounds you play at the bottom left. Obviously it's going to be easier to score higher with more rounds. Your goal is to guess what the object is as the box blocking it from your view fades. The quicker you guess, the more points you get. None of them are more than 4 letters, so don't think the word is really long. There are only 12 possible objects currently, hope to change that soon. 'INFO' button doesn't really work, just tells you to read description.
I did all of this myself. Music and sounds coming soon. Please let me know about any bugs or annoyances in the comments.