Hey there beat, no worries - if there's no time to add indicators, a simple trick might be to orient the map left to right - in Mario or other games, players intuitively go to the right. So at the start, rather than make the player go left, have them go right. Position the player at the left, and behind them is just a solid building that is not bypass-able. Leave empty space at the right.... or use glowing lights. People love to go toward glowing things because glowing = important. You already have glowing objects in your own, so just use that to lead the way.
It makes a lot more sense now that you clarified the generator part. Even if you can't do a proper tutorial, maybe a simple text popup. You already added one as I saw the signboard from before display some text when I got near it. Might not be perfect but at least it helps.
All the best for the jam Beatbreaker!
Edit: Saw that you'll continue to work on the game, nice! I think I intend to do the same for mine too.