I had a version with the first four levels of this game in one of those old timey cell phones running on Java as a kid! Now that I played the game to the end, I had hoped it would end in a less anticlimatic note though (The second set of stages has a submarine in a swimming pool! Why not have something crazy like that as a final boss?)

Becomes repetitive really quickly despite the short duration but the scenery has plenty of (destroyable) detail for an 8 bit game and it's really nice to see the following level in the distance