Very nice game! The rocket jumping felt good and I liked how the grapple had infinite range; it let me move unreasonably fast into potentially dangerous areas! The art style is nice too, reminding me of the old Atari 2600 games.
Unfortunatley at one point I respawned in the ground and couldn't escape; but, hey; this is a game jam. Great submision, I just wish it had a little music to ice the cake!