Bonka

Like Cuthbert Goes Digging, Bonka is a clone of Space Panic. With a
constantly falling oxygen supply, you must climb the platform and eliminate
the electrocuting Meanies. Hack a hole in the ground for the Meanie to fall
into, then hack a hole in the meanies, or rather, hack them through the hole
so they fall down and die. The game is customisable with four different speeds
and between one and nine Meanies on-screen.

Bonka