Hello Bluerose.
I don't mean to be rude, but if you are dying to the enemies that heal early on (Wisps) you probably need to reconsider your approach to battles. The game has been extensively tested and balanced and I know for a fact that on Casual mode (Which I assume you're playing based on you having three potion bottles from the start) pretty much every possible skill and stat build (unless you're actively trying to be as weak as possible) can make it through the game.
A wisp has 8 HP. Assuming you grab the ring in the chest in the forest early on and return it to the villager who wants it, you'll have 2 in one of your stats. Icky Bomb will kill a Wisp as soon as it explodes no matter your stats. Punch will hit for 4+2 damage with 2 strength, which guarantees a turn two kill on a wisp even if they heal. Disappointing Spark will hit for 1+3 damage with 2 intelligence, and 2 intelligence will also let your Punch deal 3 damage guaranteed. Any of these setups guarantee you an easy victory against Wisps. Even without the stat point from the short ring quest, all the fights in the forest itself can be beaten as long as you make sure to refill your potion bottles between area clears.
The game draws inspiration from older RPG and adventure titles, and because of this requires you to plan ahead and pick your fights. Monsters are visible on the map and fairly easy to outrun for a reason. Very few enemies actually do heal, and a Wisp will die to one Icky Bomb, while they in turn deal very low damage and can be bursted down in a turn or two.
I'm sorry to hear you're unhappy with the difficulty of the game. The game is challenging, but hardly impossible, but if you feel like it's too difficult for you then that is a shame.
Hello Vald.
The fights are hardly near impossible to deal with. Yes, you will probably die a few times. No fight in itself is that challenging though, and it comes down to you preparing properly for it. The reason you don't have access to your inventory in combat is because it'd simply make fights too easy, and a game that finishes itself without a challenge might as well be a book or a movie.
Apples and other foodstuffs are balanced around being eaten before combat for their in-battle buffs, not as an emergency heal. Guy is there as a way to help you sustain your resources between fights as well. As stated previously, fights are challenging, but hardly impossible. The game has been finished multiple times by different players running different setups.
As for puzzles, how do you define a puzzle? There are some that you will have to solve, but I intentionally avoided blocking the main route with hard puzzles. If you want to find all the secrets and such you'll have to figure some more difficult ones out, though. Or, you know, you could send me an email and I'll give you a hint or two.
I'm sorry to hear you're put off by the perceived difficulty of the game, but if it's not your cup of tea then that's fine as well.