Three "Errers"
"There is three errers in this sentence." Can you find them?
Hint: Only two of the errors are grammatical.
Solution: The first error is the word "is" instead of "are." The second error is that "error" is misspelled. The third is that there are only two errors.
Games

Land the Boat
Don't hit the walls, or you'll sink!

Do Not Press
Whatever you do, you must not press the red button.

The World's Easiest Game 2
As a follow up to the original World's Easiest Game, we've removed all the enemies from the newer version.

Hold the Button
Press and hold the button for a long as you can endure. You might even get on the leaderboard!
Puzzles
Toothpick Squares
Move two toothpicks to form exactly four squares instead of five.
Connect the Colors
Connect the colors without crossing lines.
Connect the Dots
Draw four straight lines, without lifting your imaginary pencil, that touch all nine dots in the grid.
Doorways
Travel through all the doorways exactly once.