Ariva

The player controls a snake at the bottom of the screen, attempting to reach a
goal at the top of the screen within a time limit. This snake can travel in
one direction at a time, and must continue uninterrupted until it encounters
an obstacle, at which point it has the option of changing its direction.
Fortunately, the screen is randomly littered with scattered red blocks, and
gameplay largely consists of plotting a continuous course along the contours
of these blocks. Subsequent (infinite) levels (with a bonus challenge round
every 10) incorporate differently-coloured blocks, which modify gameplay in
various ways — altering the time remaining positively or negatively,
teleporting the snake to a random location, becoming a necessary checkpoint en
route to the gate, or just terminating the snake. (Typically the snake will
die only upon reaching the time limit or being trapped in an enclosed space by
its own tail, which gets longer (unlike the goal, which gets shorter) and more
in the way with every level successfully completed.)

Ariva