Types of levels.

The level types are

Balanced, Easy, Hard, Full Booster, Luck, 10+ Gold 🙄 Note: All types except 10+ gold exclude spamming in level boosters.

Normal - Easy, Balanced, Luck, Full Booster

Hard - Balanced, Hard, Luck, Full booster

Super Hard - Hard, Luck, Full Booster, 10+ Gold

Nightmarishly Hard - Luck, 10+ Gold

Once you get into the 1000s, especially 1700+ you will notice this.

Balanced - Can be easy can be hard, beatable without boosters and similar to earlier levels. Luck is not really a factor

Easy - Trivial

Hard - Still fair, easy with boosters, 10+ lives likely without but luck is not a factor.

Full Booster - With the full Sam Chain can generally 1 shot or 1-2 shot with color bomb, striped + whatever the third candy is. Can be luck here but levels are still beatable with boosters after a few tries.

Luck - Even with full boosters you odds of winning are barely any better than with no boosters due to level design. See note

10+ Gold - Either you will use extra moves or you will used in level boosters unless you want to sit on the level for the next few days or weeks.

Also a note about why normal levels have such a range. King comes back periodically and updates levels. Usually this involves removing moves and usually it is for normal levels making them actually act more like hard or super hard levels.