Urthwurms move differently from earthworms; rather than burrowing through dirt, they seek existing tunnels and are stopped dead in their tracks if they run into an obstacle head-on. But as invertebrates, their simple central nervous system makes them difficult to control, and the player's urthwurm's movements are directed with a single button that adjusts their trajectory through 10 levels of endlessly side-scrolling horizontal tunnel, carelessly littered with blocks strewn across its course. When the button is depressed, the wurm gets a buzz and adjusts its course to counter its downward motion and start heading up; when the button is released, gravity resumes its normal pull -- maintaining a constant course is hence very tricky and the player is much more likely to leave a trail looking something like a sine wave.
In short, this game is a re-make of the Palm classic SFCave.
UrthWurm is an excellent PC version of SFCave, the (in)famous PalmOS worm game coded by SunFlat, a Japanese programmer. This PC version coded by BdR in Turbo Pascal 7.0 is very faithful to the original, and no less addictive. Your objective: guide the urthwurm through 10 levels. The gameplay is deceptively simple: press the SPACEBAR to make the wurm rise, and release it to make the wurm dive. If the wurm hits any part of the cave, it's game over. The score goes up for as long as your wurm is alive.
UrthWurm is one of those games that have laughably short learning curve, but will glue you to the screen for hours on end. As a bonus, the special bonus you get at the end of each level is different for each difficulty setting (easy, normal, or hard). Highly recommended.
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