If you only play open source mobile games and are afraid of wasting your time, make sure you avoid the factory tower defense game Mindustry which presents itself at https://mindustrygame.github.io/
The crazy imaginative class selection in ToME (special shoutout to the chronomancer) easily makes it my go-to roguelike, but I do find I have trouble really feeling what the impact of my build choices are, although this is a common feeling with roguelikes - I probably feel it more in ToME because it feels like every level-up has a much broader decision space than most other roguelikes. Also that most enemies (at least early game) aren't a major challenge until you hit one that wrecks you.
Most of the time I go with "rule of cool", blaze ahead, and die somewhere around the time I get to the sandworm tunnels.
The farthest I ever got was what felt like the first real boss who just teleports you to <FUN> which came out of left field and my character in that run was _not_ prepared to handle that.
I'm still trying to beat it on normal difficulty. The farthest I got was first floors of the necromancer's tower, which is about 1/4 of the game AFAIK. I resist the temptation to try any add-on, there's so much fun without them.
That is why I am a fan of games that buff your character over repeated runs.
If more games did this, the difficulty slider could go away. As an added bonus, there is a satisfaction of getting to the point where you are so overpowered the game essentially breaks (see: vampire survivors)
Honestly though, Mindustry is so much better with keyboard/mouse controls. It's a shockingly good mobile factory/automation type game, but I'd just rather play it on PC. (Or Mac, which runs it fine)
Sure, but it's much harder to hide your laptop screen under the covers at 2am, back to spouse, shielding the light, keeping your secret safe. Plus, a screen tap is much quieter than a laptop k/m.