After playing through the full game for the first time, it reminds me more of Super Mario Land 1 than anything. Like that game, and unlike Super Mario Bros. 1, every level has a semi-unique visual theme and gamefeel—as long as you ignore the desert levels, which all pull from the same dreadful bucket of enemies and gimmicks.
The collision is really bad. The shrunken player appears to be about a tile tall but is actually a bit over, even while crouching; maybe a third of the hits I took came from stuff that looked like it should've gone over my head (Birdo eggs, etc.). Also, projectiles that bounce off walls are still quite alive, despite looking dead (and, in other games, being dead). And for some reason, I kept getting wedged into walls. I could just jump out, but it was a bit distracting. Pretty buggy by Mario standards!
Beat with warps and continues (but no cheats, and I beat every level at least once).
The collision is really bad. The shrunken player appears to be about a tile tall but is actually a bit over, even while crouching; maybe a third of the hits I took came from stuff that looked like it should've gone over my head (Birdo eggs, etc.). Also, projectiles that bounce off walls are still quite alive, despite looking dead (and, in other games, being dead). And for some reason, I kept getting wedged into walls. I could just jump out, but it was a bit distracting. Pretty buggy by Mario standards!
Beat with warps and continues (but no cheats, and I beat every level at least once).