Disclaimer: I'm not a designer just an amateur who hangs around here sometimes, but here are my thoughts:
- I like the main 'Pasty King' logo with the crowns.
- Not sure on the purple, it seems a bit much. If it's a key brand colour you could perhaps try using it in a more limited way - just behind the headings, or maybe put some of the text in boxes so the background isn't so all consuming.
- the 'the original and best' bit looks blocky & pixelated
- the clipart crowns aren't really doing anything
- the pasty image has not been cut out very well & the drop shadow just makes that more obvious.
- there's absolutely nothing wrong with using one of the classic serif fonts ( is that Times New Roman?), but in this context I'd want something considerably bolder for the key information. At the very least I'd think about capitalising the opening hours & 'click the crown' parts.
All that assumes you're here because you're interested in design & would like to produce something better. If you're just doing someone a favour, I'd agree with others here who suggest hiring someone in (or getting them to, obviously) .
If you are committed to designing it yourself don't lose heart too much. Takeaways local to me put worse design than this through my door on a weekly basis.