I know how difficult it is to make games in scratch, I have made some myself, and you did a good job. The music starts out good, but gets a bit annoying when you hear it so much. The gameplay was fun, but lacked a bit of variety, every zombie was the same and acted the same. Most graphics were in a fun style, but you used some graphics that didn't completely fit the rest of the game. The shop did not work for me, but maybe I understood it wrong.