The trailer for this game is exactly what you get, so if you enjoyed it, you will enjoy this game. It is a combat-based action RPG in the style of an older Diablo game with a focus on straightforwardness, simplicity, and an absurd, lovable, and cartoonish style. The main character, Rick, is a melee fighter that you can augment by choosing different stats and items to wear.
Like Diablo, the fun of the game is in beating things up and finding items. Rick accomplishes both of these by slamming his knife into enemies until they die in Rogue-like fashion. The strategy comes how you plan ahead by choosing what to wear, what to carry, where to stand, etc. rather than the actual combat, which is mostly just your stats comparing with the monsters and deciding how to use your consumable items. You also have a special meter that can be used to give yourself a boost for a short time. It's easy to understand and enjoyable.
Once you finish the game, you can try again with a different character and a stat focus. There are 9 or 10 special abilities you can pick as you level, some of which are passive. You can have up to 4, but some of them won't be relevant for the way you're playing. For example, I wouldn't choose a power like Flash (which uses your special meter to teleport you) on a character focused on Strength and Speed because I would never have enough Willpower to use it consistently. Or similiarly, I wouldn't choose Eagle Eye (which raises your attack rating and critical hit rate) on a character with a high Dexterity because I would already be hitting everything accurately and it would be redundant. You can choose a special ability to focus on one path, use in an emergency, or to balance out a weakness. There are enough different combinations and achievements to play through the game several times if you want.
If the store page appeals to you and you're looking for a light, enjoyable game, I recommend this. It's exactly what it looks like and it has enough depth for me to enjoy 90+ hours.