TY for the amazing feedback! I'm working on the story for after boss 3 right now which also includes camera fixes and the fix for the fishing npc.
Edit: update is out now! Fishing NPC scaring away fish should be working - but if you have already caught all fish available to you right now at s-rank then it'll just go back to normal fishing mode.
Edit Edit: There's now a variant for the first boss so its not always the same fight, planning to add more variants for this and other bosses. The TD boss has been updated with ranged mobs so its a bit more difficult, but still on the easy side to keep it fun.