Crappy controls - 1 point
Poor jumping platform hitboxes -1 point
Game can only be beaten by trial and error and a lot of repetition to learn boss movement patterns and movement patterns of guards on level 6, gets boring before you do, completing level 6 three times with all 3 guys is a chore.
So end result is 2 points.
Also a peculiar thing - Altrough I picked up every coin I ended up only having 26 coins at the end which didn't let me to enter secret level. Are there really 4 coins hidden so well or or is this some bug? Using cheats I got the 30 points needed. The secret level was a dissapointment trough. Minus falf point for missing coints, not a full point just in case it is my fault and I couldn't find 4 coins.