Under rating threshold (hideshow)
warning spoilers
for 25:
1. move the safe 2 units past the wood
2. put the explosive on top of the wood.
3. shoot the explosive
4. quickly shoot the safe and move it on the button activated disappearing block.
5. press the button
6. put the safe on the red switch.
7. activate the electric blocks
8. touch the electric blocks
you can see a video walkthrough on youtube.
Under rating threshold (hideshow)
Good little puzzler. Some of the shooting levels need to be reworked, though. The element of timing is such that it's essentially luck based, and on the ones where you have to play ten seconds of the level before you get to the shooting bit and have to start again are extremely annoying.