The I-tunnel is a tunnel linked with the N-tunnel. It is 7 levels long. Branching out are the C-Tunnel (I-1) and H-Tunnel (I-7). Like the N-Tunnel, it uses conveyor tiles, but there are also sideways conveyor tiles, different to the N-Tunnel. I-5 is insanely hard and is in the poll.
Levels
| Levels | |
|---|---|
| Level I-1 |  |
| Level I-2 |  |
| Level I-3 |  |
| Level I-4 |   |
| Level I-5 |   |
| Level I-6 |   |
| Level I-7 |   |
Difficulty
| Sandbox |
|---|
| Very easy |
| Easy |
| Not too easy |
| Almost medium |
| Medium |
| Over medium |
| Above medium |
| Fairly hard |
| Hard |
| Extra hard |
| Insanely hard |
| Hell |
| 1 | 1 | 2 | 2 | 1 |