There are 8 levels in this platform game:
[1] with spikes only
[2] with spikes and lasers
[3] with spikes, lasers and moving spikes
[4] - [8] with spikes, lasers, moving spikes and rockets

The movements of Bob is controlled by the buttons in the bottom left corner.
Press the up arrow button in the bottom right and Bob will jump.
Press the button in the top right corner will change the buttons in the bottom left corner
to a touchpad. This touchpad control the movement of Bob's robot which can be used to
block the laser and the spikes.