There's some jumps here in the footage but I save-stated/load-stated parts I got impatient with. Still couldn't beat them all the levels as the time limit is way too tight, and others I just gave up on. It's basically a clunky Boulder Dash clone. At first I couldn't figure out how to use the dynamite you collect. Eventually found that you have to hold down fire button for an unspecified amount of seconds and then move away, or else get blown up. Could have done with a ticking sound effect here so you knew when you dropped it. Just badly implemented. Some enemies explode into more enemies or slime (?) instead of the expected gems, so at least that's a different feature than the original Boulder Dash. https://csdb.dk/search/?seinsel=releases