Clever and Smart
This game was solved thanks to Mobasa Joe and some volunteers. You can find the original solution with even more info at http://www.cleversmart.de.vu.
This solution was translated into Englisch by Martin Brunner.

General Info

    * If you see a car go into the next sewerage. If you leave it there is no car anymore.
    * You have to earn about 1600 GE until you can buy everything you need.
    * Best way to earn money is at the snail race if you buy a snail costume before and win the race yourself by rotationg the joystick very quickly.
    * If you are in the sewerage you have to choose with the space key which action Fred Clever makes if you hit the joystick fire button.
    * If you drill at a wall you have to fix the blue cable there first and directly to drill into the cable (which looks a little bit strange).

The Map
Map

Solution
Go to Cleverman Discount (A) and buy a boilersuit and an apron. Go to the market (B) and buy flowers. Go to the old shed (C) down left where you find an old toolbox and a picklock.

Go to the Rust Ltd. Scrap (D) and buy a hammer, screwdriver and pliers. Go to aunt Annie (E) and buy 5 electric points, a lightbulb, 150 meter cable (so buy a cable three times), the phone and the ampere meter. 
Go to the Acme Construc. (F) and buy the drill. Go down the next sewerage (Nr. 8 on the Map).

Plan

Now walk to the next power supply (the way is marked brown on the map). Then click on it. Now select that you want to fix the cable. You can fix it by clicking on the wall that connects to the cable roll. 
So fix the cable like shown on the map until the position of the red cross. Before you are able to drill at this point you have also to remove the wall that is in the way to the red cross. 
You can also remove it by drilling. After that you are able to continue your way to the red cross and drill for Dr. Bakterius.