If you have five spare minutes, Void Ace will fill them. Everything happens on one screen with 3 lives, bosses with 65 base HP every third wave, and the whole thing runs straight in the browser - no downloads, no sign-ups, no fuss.
Every third wave ends with a boss that soaks real damage and answers back. Regular enemies come in patterns - sine sweeps, dive bombs, wall formations - and each pattern has a spot where it cannot hurt you; finding those spots is the actual game.
It suits anyone with a queue to wait in or a kettle to watch: students between classes, commuters, parents stealing ten quiet minutes. There is no meta-progression to lose and nothing to catch up on - a week away costs you nothing but a little sharpness.
Endless waves, 3 lives, a boss every third wave.
Void Ace announces itself inside ten seconds, which is the only test that matters when sorting a catalogue this size. Kepung Shelf games are chosen for how quickly they say what they are.
It is rated 4.4 out of five in our notes, and the number is held up mostly by how quickly it can be restarted rather than by how clever it is.
Keep it if you play in short bursts. It rewards a second attempt far more than a first, and the second attempt costs nothing but the tap.