my kids and I have tried a bunch of the 2d options and we'd recommend Bloxels for making platform or top down 2d retro style games.

It's very fun to use and it includes everything you need - sound, pixel art editor.

We started playing with it in 2020 and my kids still pick it up and make new little games themselves, without my help.

Downsides: 1) there is no coding at all so you are limited by the features it offers 2) another monthly subscription