Bug fixes and more (Izuna Adventures)

- Added an indicator when reaching the portal that tells the player to press "W"

- Fixed a bug that prevented some masks from spawning kunais

- Removed the game ceiling, meaning that you can now jump off screen

- Changed the masks color to white and the spikes to red to increase their contrast with the background

- Toned down the difficulty on stage 4

- Decreased the kunai masks range of activation

- Increased the leeway for card transformation from platform

- Slightly increased jump height

- Slight changes were made on stage 3