Fixing pyramid tileset and allowing level restart by pressing "r"

The pyramid switch [24] deletes the block directly under it now, not 2 blocks. Now the pyramid levelset works again (see lvl2).
You can now press "r" to restart the level (e.g. if you are stuck in front of a door as a mummy that can only be opened as a human [pyramid/lvl1] or if you failed and don't want to walk the way to the spikes).