passable with some problems
i'd have given this an 8 or 9 out of 10 if a couple gameplay issues had been done correctly
the timer was a pointless nuisance.
since you have infinite lives.. the timer simply means that sometimes when you have 30 or so seconds left right at a death, you need to sit there and just wait for the clock to run down since attempting the level is pointless.
timer should just be removed or it should count in the opposite direction and be used for score purposes.
need health. running through a level just to die instantly because you were a couple pixels to the left and bumped into a spike accidentally is pretty frustrating. it doesn't fall into the category of what i consider "fun difficulty" but rather falls into what i call "tedious difficulty"
sound effects and graphics were pretty good, though the music becomes unbearable after a few minutes.