"You have to collect the white orbs (called calcium) so you can repair the walls and all walls must stay intact, or you lose" <-- Thank you!!! Wow! You really need to mention this game rule on the webpage. Otherwise, some gamers may not know what to do in the game.
"The game was indeed made with QB64, if you're interested, you can join the community on Discord or the forum!" <-- I always visit the official forum to read their discussions though I am not a member of the forum. The official forum is actually very, very active. QB64 has a large user community!!!
"Glad you enjoy BASIC! It's a great language." <-- Wow, yes. By the way, I am the host of the jam. You are very welcome to join if your have time: https://itch.io/jam/jam-for-all-basic-dialects-2
Finally, after I read the instruction given by you, I played the game again. The game is an interesting action game.