I made it up to round 54 with no continues and after about an hour and a half of gameplay. After 53 rounds and 2 bosses and 2 mini bosses later, I made it to rond 54 and killed every enemy. I thought I was done but apparently not... Every enemy gone, doesn't go to round 55? I could move and shoot, and float, but it wouldnt advance. Timer never ran out! No fruit left to collect! WTF! Does anyone have any suggestions, or has anyone encountered a similar problem?

Do the level select cheat (Left, B, Right, Up, Down, Left, Right, B) [on title screen]; Then choose level 55 and see if it happens for any levels after 55 and to see if it works.