18-year-old building a 100% free learning-by-playing platform! Feedback needed

Hey! I'm building a free custom-learning game platform for kids to learn English vocabulary, and really could do with some feedback from English teachers! https://yahaaa.com/

(I know there is a lot to improve I can only do so much at a time .)

Technically, I'm not an English teacher, so I guess you don't want my help.

I did help somebody with his website once, but that was a long time ago.

P.S. I believe the expression is, "There's plenty of room for improvement."

@Yahaaa The first thing I'd change is "10's of" on the homepage. The main reason is that the apostrophe shouldn't be there. Never add "'s" to anything to create a plural. Until you reach the point where you can say there are "100s of", I'd go with "Loads of" or similar.

The other thing I've noticed on the main page is the inconsistency in singular/plural in the words under the thumbnail of a picture of broccoli. You've got "Beans, vegetable, onion, peas, carrot ...". I'd pluralise all of them.

I'll point out stuff as I notice it.

In the FAQs, the third one reads "How to automatically generate english learning game worksheets?"

1) You need to capitalise "English".
2) You need a hyphen between "English" and "learning".
3) It should open with "How can I". We spend a lot of time on this forum reminding learners that we don't start questions with "How to".

The final FAQ says that the two people behind the site are called Devon Yuan and Darragh Baratin, and that it's based in Amsterdam. Your profile says you're an American national based in the USA. Your title suggests that you are the 18-year-old developing that site. That appears to be at odds with the information on the site. Please clarify the situation.