It's nice not having to use energy to play the levels, but I don't think the 20-minute wait should apply if you fail to beat a level. I think you should be able to re-attempt it immediately.
Energy Ball, 3x EMP Gun, Extra Sucker (in the top slot), Armor Plate, Capacitor, Lens System, and Math Chip Z-2. Piece of cake for all the difficult levels. Stay at an edge and dance around to avoid enemy fire.
Very glitchy - The ball can fall through the line as it's bouncing. I've lost levels with a line placed between the ball and the mines, simply because the ball fell through it as it bounced.
For Level 4, use the smiley face on the big block to help center it. Let the stack stabilize (all the faces will turn to smileys) when it's even, before adding the next level of blocks.
There is a glitch where Fancy Pants Man or the shells can fall through floors. Very annoying when you lose the shell through the floor. Otherwise awesome game. 5/5.
Many bugs beginning with level 13+. The past versions do not exactly replicate the original movemnet, so they will get stuck or fall into a hole when the original version made it back. Otherwise a fun game. 2/5.
Original twist, using the mouse to click rather than moving a paddle. Are there any power-ups hidden in the blocks? Also, the first few levels are slow. I would suggest ramping up a little quicker, so it doesn't get tedious.