I'm using it to test new tiles I'm finding right now, since it's lucky number 7.
I managed to pass up through xx 00, xx 01, xx 02, and xx 03. (Where xx is all the numbers between 00 and FF, meaning I finished it with the second numbers 00, 01, 02, and 03). I'm going around the cycle again, this time to get through with xx 04, xx 05, xx 06, xx 07, and xx 08, and maybe some xx 09's. (I'm testing 5 tiles at a time now.

)
I'm on 3A again right now.
By the way, here's the list of all of what I have experimented with so far. There isn't many new ones, but it is an improvement...
00 07: Transporter that you can only push things onto. When it moves, it makes invisible walls on its trail. When it moves, it will not stop until it reaches the level border or an object. Any tiles that are passed by the transporter will act like a wall.
05 07: Transporter that you can only push things onto. When it moves, it makes invisible trampolines on its trail. When it moves, it will not stop until it reaches the level border or an object. Any tiles that are passed by the transporter will act like a trampoline.
08 02: Appears as an empty tile at first, but changes into a green down conveyor after stepping over it.
09 02: Appears as an empty tile at first, but changes into a green left conveyor after stepping over it.
09 07: Appears as an empty tile. Acts like a trampoline.
0A 02: Appears as an empty tile at first, but changes into a green up conveyor after stepping over it.
0B 02: Appears as an empty tile at first, but changes into a green right conveyor after stepping over it.
0B 03: Appears as a floor tile. If you go into a level with one of these, the game will MAV when you quit the game.
18 02: Appears as an empty tile at first, but will send you upwards and change into a green down conveyor after stepping over it.
19 02: Appears as an empty tile at first, but will send you to the right and change into a green left conveyor after stepping over it.
1A 02: Appears as an empty tile at first, but will send you downwards and change into a green up conveyor after stepping over it.
1B 02: Appears as an empty tile at first, but will send you to the left and change into a green right conveyor after stepping over it.
20 01: Appears as an empty tile. Acts like a wall. Can block fireballs.
20 04: Horizontal white gate that isn't solid.
21 04: Vertical White gate that isn't solid.
2A 02: Appears as an empty tile. Acts like a conveyor that is facing down.
2B 02: Appears as an empty tile. Acts like a conveyor that is facing left.
2C 02: Appears as an empty tile. Acts like a conveyor that is facing up.
2D 01: Appears as an empty tile. Acts like water.
2D 02: Appears as an empty tile. Acts like a conveyor that is facing right.
30 03: Looks like a floor tile. Acts like an invisible wall.
38 08: This is a null or unused tile that gives you a MAV when you enter the level. Using it isn't recommended.
61 02: Break tile that can withstand 4 steps.
62 02: Break tile that can withstand 5 steps.
63 02: Break tile that can withstand 6 steps.
64 02: Break tile that can withstand 7 steps.
65 02: Break tile that can withstand 8 steps.
66 02: Break tile that can withstand 9 steps.
67 02: Break tile that can withstand 10 steps.
68 02: Break tile that can withstand 11 steps.
69 02: Break tile that can withstand 12 steps.
6A 02: Break tile that can withstand 13 steps.
6B 02: Break tile that can withstand 14 steps.
6C 02: Break tile that can withstand 15 steps, and so on, continuing with more withstanding steps for every object number with 02 by it.
71 02: Break tile that can withstand 20 steps. (I'm going to use bigger intervals between the step amounts now that you get the idea.)
76 02: Break tile that can withstand 25 steps. (It's not like you are going to use this strong of a break tile for some real puzzles.)
7B 02: Break tile that can withstand 30 steps. (Break tiles can be decorational, too! It could be like changing floors or something!)
80 02: Break tile that can withstand 35 steps. (These break tiles are going to end sooner or later, right?)
85 02: Break tile that can withstand 40 steps. (Sometimes I think... Is this worth it?)
85 03: Appears as an empty tile. Acts like lava.
8F 02: Break tile that can withstand 50 steps. (Moving on to bigger intervals... And stronger break tiles.)
99 02: Break tile that can withstand 60 steps. (Is this strong enough for you yet?)
A3 02: Break tile that can withstand 70 steps. (Don't you have the money to buy normal floor tiles?!)
AD 02: Break tile that can withstand 80 steps. (Now that is one strong break tile!)
B7 02: Break tile that can withstand 90 steps. (Woah!)
B0 05: Spikes that rarely emerge.
B0 07: Non-firing movable cannon.
B4 00: Walkable darkness/Walkable empty tile.
BB 02: Break tile that can withstand 94 steps. This is the strongest that a break tile can get.
C8 01: Appears as an empty tile. Kills you when you step on it. Can trap boxes.