Ehhh, strategies only get you so far, it's not like I'm a newbie to the genre, and it's not like I can't semi consistently hit level 2, depending on what skills I get.
Mods, however, might suit. But honestly, if a game needs modding to see later content, there... Might be a balance issue?
Level 1 is difficult, but by no means impossible (sans the chameleon miniboss who is an absolute bitch) unless you get a heavy spawn of wizards or slimes.
Level 2, however... Can't lie, there's a lot of tanky bastards there, and it's by no means unusual to be unable to kill blockroaches before they create an absolute swathe of complete block, or to have so many Cutterflies that you get screwed a few rounds after that happens.
Skills, items, and spells being unlocked is good and all, but one thing that might help is a permabuff system. That way, you get the challenge portion moving to later stages the more you earn coins (spending them on buffs after you have all items/spells.)
If there is a permabuff building to be unlocked already, I'd really, really like to know where the heck it is. If not, that's one solution to the problem that might work and keep engagement for players who find it too tough that's perhaps more acceptable than "easier mode"
Still definitely holding out for "Slave Run", though.