Eco Hero Marie v2

Thanks to everyone giving their feedback after the gamejam!

• I've fixed the few layering issues people spotted, but you can now properly walk in front of and behind trees, reeds, the van and animals
• A new introductory cutscene that gives some more context to the game mechanics, voiced by the lovely Lep
• Added voice lines for picking up items

I'm considering adding more levels and things to the game, so if you want that let me know - your encouragement goes a long way!