Cursed Treasure 2

Cursed Treasure 2 is a classic Flash browser tower defense strategy game developed by IriySoft and published by Armor Games, released in 2014 as the sequel to Cursed Treasure. Players take the role of a dark lord whose mission is to guard magical underground gems and stop paladins, angels, ninjas and other so-called heroes from stealing the treasure. There are three tower factions: Orcs, Undead and Demons. Towers can only be built on land tiles of matching colors. Earn gold by defeating invaders to upgrade towers. You can also unlock powerful spells such as meteor strike and terror, cast manually during tough battles. It features 24 campaign levels plus a challenging night mode. Gain skill points after clearing stages to unlock 30 global talents and 50 badges. With cartoon fantasy art style and fun anti-hero premise, the game uses mouse for tower placement plus hotkeys for spells. It is one of the most famous tower defense browser games in the Flash era. An Ultimate remastered version was later released on Steam.

These games get the keyboard directly — the controls are whatever the game itself defines, usually in its own help or options screen. Some games show on-screen buttons on phones.