Run-on sentences fall, split each one at the seam between its two clauses before they stack to the top.
Run-on sentences drop down the canvas. Pick a punctuation mark, a period, a semicolon, or a comma plus conjunction, then click the gap between the two words where the independent clauses join. A correct mark at the correct join clears the sentence. A wrong attempt costs points, and if any sentence piles up to the top, the run ends.
Comma Splice turns fixing run-on sentences and punctuation into a falling-block arcade, training the editing eye good writing needs.
Joining two independent clauses with only a comma is the comma splice, and the remedies are exactly the three offered: a full stop, a semicolon, or a comma plus a conjunction.
Requiring you to click the join as well as choose the mark is the original precision.
Locating the seam is the harder half and the one that matters. The error is not about commas in general but about where two sentences have been welded together, so a correct mark in the wrong place is still a broken sentence — and finding the boundary means identifying what could stand alone.
Comma Splice is an original free browser game from PlayPendium that turns fixing run-on sentences and punctuation into a falling-block arcade challenge. Play instantly, no install.