Dulp is a minimal puzzler in which a coloured ball orbits a multi-coloured wheel, and you have to tap as the ball reaches the matching-coloured section to smash it. Destroy the entire wheel, and you'll complete the level - moving on to an increasingly challenging one.
Its challenging gameplay rewards focus and reflexes, but the difficulty level has just been bumped up a notch in the latest update - and that's all courtesy of the new endless mode.
It's pretty much as it says on the tin, but brings your stamina into play over the longer - potentially infinite - playing sessions as you desperately try not to make that one mistake which signals game over.
Other improvements include a colour blind mode, so that everyone can get involved with Dulp, 120 new levels, and a redesigned UI and colour scheme.
Dulp has had some solid success since launch, having been featured on the App Store and Google Play and reaching the top 10 in a variety of top free lists.