There seems to be 2 broken achievements: "First level" and "Third level". Also, If there is anyone who knows how to get the "Courous kid" achievement, please tell me <3!

are they bugged?

huh? And well, whats that size of the game...

I have no clue how to get this achievement, guys please help

It appears that the name of the executable was changed, but Steam still looks for the old name; gives an error saying that the executable is missing. Also, finished the game, zero achievements. Swing and a miss.