hey, thanks for playing it.
this game was made for a game jam in only 15 days, this is why it is that short, sorry for that. :)
but if you want there is this version of the game that contains some quality-of-life updates - https://vkaike2.itch.io/zombeez-game-jam-post-jam
like the level, which you mentioned and a tutorial.
I haven't updated this page yet because I have to wait for the voting period of this game jam to end.