Difficult

Tiny Rogues is a challenging fantasy rogue-lite bullet-hell dungeon crawler with rpg elements. Build a new unique character each run and fight one monster-infested room after another! Discover unique weapons, collect magical items and level up to become more and more powerful!

Command your troops through an epic (mis)adventure as you defend exotic lands from dragons, man-eating plants, and ghastly denizens of the underworld -all with flashy new towers, levels, heroes, and more goodies to help you crush your foes in this Fantasy Action Tower Defense game!

Welcome to Kindergarten! Have fun trying to learn and share...and not die. That's important too. In a school that's just not quite right, it's important to be friendly...and take out those that aren't.

Minesweeper but the rules are changing.

Master time in this time-bending sokoban-like puzzle game with a story. You travel back in time to be in two places at once, to solve puzzles impossible to complete alone. Your success hinges on your ability to collaborate with yourself. Can you learn to manipulate time to save humanity?

Downwell is a curious game about a young person venturing down a well in search of untold treasures with only his Gunboots to protect him.

It's the first ever chess variant with spatial, temporal, and parallel dimensions. It's 5D Chess With Multiverse Time Travel! Move pieces back in time to create branching timelines. Send a rook to a parallel dimension. Protect your kings in the present and in the past!

Devil Daggers is a fast-paced shooter that places you in an abyssal arena to face endless legions of demons. Armed with versatile magic daggers and a fluid movement system, fight to survive as long as you can.

Fight, fly, flourish! BLUE REVOLVER is a manic arcade-style shoot-em-up built for newcomers and psychos alike. Powerful special weapons cut through tough areas, while an adaptive difficulty system tailors the game to your skill level as you evade and counter a maniac environmental force!

Minimal physical puzzle with explosions

VVVVVV is a platform game all about exploring one simple mechanical idea - what if you reversed gravity instead of jumping?

The craziest aquarium game ever! Tend to your fish, keep them happy and they'll reward you with coins and jewels. Buy tank upgrades or egg parts which hatch different in-tank pets. These pets can help you feed your fish, collect coins, or even protect against the aliens that will invade your tank.