Try Scratch and Construct 3 since it can be used on your device (browser-base),
If you mean a game engine that you can use to make games on your tablet, I hear Twine works, though probably not so well. If you just mean making games for your tablet, see above. But you really need to say what kinds of games you want to make, because there's no such thing as a perfect game engine. It depends on too many things.
unfortunately the perfect game engine does not exist, i looked into google's all 200 pages of suggestions and found ok engines that are listed in: https://alternativeto.net/software/unity/ but no such thing exist.
Let me tell you why it doesn't exist, the main problem is google forcing people to use newer phones like Apple is doing. This means version 5 and below are old to google and google will make rules like forcing developers to use 64bit which older phones in version 5 and below do not support.
another reason is how users will interact with the software, if you ant to make it 3D it sounds simple but coding wise it is not. Phones hardware are limited to certain degree, it is not like Apple where an app can run for 5 Gen of versions. The software will try to correct user but the user will not accept the changes, thus making the software useless to them but nothing is wrong with the software because it was the user fault.
last one is how it would be possible to pay the developers of the perfect software. If they lock it behind payment, people will steal it instead or not pay it. If they limited than it is no better than certain software found in https://alternativeto.net/software/unity/. While you can say donation will work, it only works if the developers continue to work on it and not leave the project or stall any future updates.
my suggestion to you would be: GDevelop since its simple to understand and offers lots of events to create a mobile game, all without coding.
I’m going to mirror what No Time To Play said – you need to know what kind of game you want to make first. If you want to make an interactive fiction game, Twine would probably be fine. If you want to make a JRPG, then RPG Maker would be a good fit.
There are a huge number of engines out there, and some of them are hyper-specific to a particular genre (like those I just mentioned), and some of them are generalized (Unity, Unreal and Godot are great options). Using a non-specific engine requires more abstract learning though.
To answer your question about your hardware, that will undoubtedly limit what software and techniques you can use. I am sure you can find something that will work but it will still probably require some learning.
EDIT: Oddly enough, I was poking through a Kenney bundle and found a PDF called “Getting Started with Game Development”. He suggests Construct 2, Game Maker: Studio and Stencyl as pretty easy to learn. He also mentions Löve – I found this to be pretty easy to learn BUT it is a framework, not an engine. You’d need to learn Lua.
Of course, any and all of these suggestions may or may not work with your hardware.
The perfect game engine = going straight from art to code. An engine that takes art as input and outputs a whole complete game.
Many of the engines do almost that, but generally there is some level of coding or scripting involved.
Unity has everything you could possibly want to make any kind of game.
Construct outputs games that work well even on older computers.
Many people seem to like Godot.
Pico works well on older devices also.
But I don't think any of those tools are going to run well on a tablet.
It's generally best to learn some Javascript, using just Javascript and html you could make your own web games from scratch.
For me, when developing, I like to have a really big screen and a keyboard, if your tablet can have a keyboard,
you would be able to do Javascript development generally comfortably,
but I would say that it's best to have a desktop/laptop with as big of a screen as you can get, and a mouse and keyboard.
