Hi, thank you for your feedback. In terms of controls and gameplay, please read the overview section carefully or click the "?" button in title screen for more information.
The overall game is an endless maze-like instance with various teleport locations (represented as Demonic Swords). Therefore, you can go to these teleport locations to move around different areas of the game and don't need to wait in one place for the enemy to re-spawn.
In terms of jumping, you can tap Spacebar 2 times to perform double jump.
Attack is designed based on player facing direction, not the mouse direction, so just left-click or left ctrl to perform attack. Due to the sword being out of control, it will have 25% chance of inflicting self-damage to the player (attacking the player from above). In normal situation, the sword will go horizontally according to player facing direction at the moment you press the attack button.