The only enemy is yourself, time and gravity.
Julius Olofsson is a technically talented Twine developer. i first became aware of his work during Ludum Dare, where he crafted a very unique Twine game called Alone/Awake.
20 Strokes is an interesting creature. At first blush, it’s a game about swimming. The reader clicks the text to stroke. 20 strokes to reach the end of the pool, 20 links to click. The game warns that you need to “hurry,” so you do not sink to the bottom and drown. If you’re a quick reader (or clicker), then most of the game will have passed beyond notice. The real story is found when you stop swimming.
I won’t spoil the surprise by telling what can be found in those underwater moments before you surface, and I never reached a point wherein you touch the bottom, but it’s an interesting take on memory and loss. In those moments, your character experiences a different kind of drowning — suffocating under regret and buried memory. Playing through these segments will significantly lengthen the game to about ten minutes, and you can choose to keep taking laps but I didn’t see a difference in the story because of those laps.
The weakness in 20 Strokes is, unfortunately, some aspects of the English language. Olofsson is Swedish, and he handles English like a non-native speaker. The prose suffers occasionally from awkward speech and unfamiliar phrases that roll off the tongue uncomfortably. However, to ignore the piece because of this would be a disservice to the author and the game as a whole. 20 Strokes was a worthwhile piece, despite the choppiness of the language and well worth your time.
You can find out more about Julius Olofsson and his other work at the PaperBlurt website.