I finished the first mvp (minimum viable product) of leverman with all features i wanted ;-)
The first level is fully playable from start to finish and contains the following features:

- Tilemap based
- Player based on character controller including double jump support
- Simple generic following camera system
- Player interaction system (Levers, Elevators, Triggers...)
- Up/Down elevator systems which gets requested automatically when player is near a stop trigger (Stops are detected by line traces in the player interaction direction up/down)
- Jumppads
- Spikes and lava, no enemies at all
- Kill and respawn system including checkpoint support
- Levers to open doors / sink lava etc.
- Moveable platforms with obstacle detection (No timeline or matinee at all)
- A very simple main menu

But there are tons of things todo to make it actually be finished:

- What type of character (Human? Animal?, Robot?)
- Find and apply a suitable art style for the game (Scifi prefered)
- Explain stuff (Indicator when you can interact, Simple tutorial level)
- Sounds and music (Sound-generator - but music is a bit harder...)
- Save games / Checkpoints
- Goodies to collect
- Better main menu + Options
- Track statistics (Time, Deaths, Counts etc.)
- Create more levels (11 levels are already written on paper)
- Make it a bit more easier (Seems to be pretty hard...)
- Bugfixes or course

Download MVP-1 (x64 windows only):
http://root.xenorate.com/final/lman/lman_alpha_mvp1.zip

Attached are some screenshots - including the original paper idea from ~1995.

Controls mapping:

Move to the left / right:

- Keyboard (A or D)
- Keyboard (Left or right arrow)
- Gamepad thumb left X-axis

Jump:

- Keyboard (Space)
- Gamepad (X button)

Interaction up/down:

- Keyboard (W or S)
- Keyboard (Up or down arrow)
- Gamepad thumb left Y-axis (only in digital mode!)

Interaction use:

- Keyboard (E)
- Gamepad (Y button)

What do you think about this? It it okay for the first mvp? Is it fun to play?

Dont be frustrated when you die a lot, it is not that easy at start.