There should be a button or key to blow up your ship automatically. For example, when you use the ship with extra fuel and know you missed and are going to run out of fuel and the sun will be past the planet you left from by that time, you should be able to blow yourself up to respawn on the planet to have a chance to keep going.
B!g Mike- on 29 just hold the blue one til the box and the 1 orange are on the conveyor. Move your mouse down to the yellow, but wait for the box to fall and break open before you hold it.
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