This is a big update, but it's mostly "under-the-covers" stuff to prepare for porting to consoles and macOS. The game has been migrated from Unity 2017.4 to Unity 2018.3, and during the migration I've implemented lots of performance improvements and general bug fixes (too many to list here).
Over the last few days I've received reports about an issue completing the level with the chupacabras' lair - that's also been fixed in this build.
Please do continue to let me know of any issues you run into - it will really help me, and of course the wider community. You report 'em, I'll fix 'em. :)