For the background from what I understand:
The jump failed because the procedure it used (arcfolding) was unstable and caused a huge rift in space-time that they couldn't close. The Arclight crashed, but its integrity field and arc reactor remained intact, and the crew was revived by . The rift spilled out a huge cloud of death called The Melding, which covered pretty much the entire earth except for a few miles around the Arclight thanks to their reactors still running (so far as we know). That's where the game starts.
As to why he couldn't crash somewhere else: they had only a few seconds of thrusters on one side of the ship, they could fire them or not, that was the only choice.
The jump failed because the procedure it used (arcfolding) was unstable and caused a huge rift in space-time that they couldn't close. The Arclight crashed, but its integrity field and arc reactor remained intact, and the crew was revived by . The rift spilled out a huge cloud of death called The Melding, which covered pretty much the entire earth except for a few miles around the Arclight thanks to their reactors still running (so far as we know). That's where the game starts.
As to why he couldn't crash somewhere else: they had only a few seconds of thrusters on one side of the ship, they could fire them or not, that was the only choice.