This seems like a decent beginning to a fun story. Knowing that Peppekz worked on two other projects for this game jam, I'm sure time was very tight on getting this together. I feel 'ya, believe me, I do!
I would have liked to have seen just a bit more buildup before the giant attack. It was a bit too obvious that their friend was still alive and that the giant was searching for the mc.
The end result was the battle lost the dramatic punch it was aiming for. A cliffhanger ending may have worked better, stopping just before the battle. The giant ominously peering down from the open ceiling would leave questions, but increase tension.
Regardless, I'm looking forward to seeing where the story goes from here!