Tunneler

Guide your dotted line under the towers of an inconveniently narrow kingdom. Be aware the bird's-eye view places the ground floor above your sneaky path.

https://www.scullinsteel.com/apple1/

Press the Reset key. Click the Load button. Copy and paste this mess of hex. Wait for it to type in. 

300R to run. R to run again, after you smack into the underground part of a tower.

300: A9 8D 20 EF FF 20 EF FF A9 05 85 00
: A9 0A 85 09 A9 09 85 10 A9 FF 85 08 4C 80 03

340: 0E 0E 55 48 41 0E 0E

380: A9 05 85 02 E6 08 E6 01 A5 01 65 00 65 08
: 69 03 C5 09 30 05 38 E5 09 10 F7 85 01 4C F0 03 

3F0: A9 00 85 06 A9 1A 85 07 A2 00 A5 00 10 02
: A9 00 C5 10 F0 02 30 02 A5 10 85 00 A0 0E E4 00
: D0 02 A4 07 A5 02 C9 03 30 19 A5 01 18 65 02 E9
: 02 85 05 E4 05 D0 02 A0 20 E4 01 D0 06 A4 02 B9
: 3F 03 A8 E4 09 D0 02 A0 8D 98 20 EF FF AC 11 D0
: 10 03 AC 10 D0 C0 DF D0 0E A5 06 30 0A C6 00 09
: 80 85 06 A9 8F 85 07 C0 95 D0 10 A9 40 24 06 D0
: 0A E6 00 05 06 85 06 A9 7C 85 07 E8 E4 09 F0 02
: 10 03 4C FA 03 C6 02 F0 03 4C F0 03 A5 01 D0 02
: C6 09 C9 01 D0 02 C6 09 C5 10 D0 02 E6 09 A5 09
: C9 04 10 02 A9 04 85 09 A5 09 C9 0A 30 02 A9 0A
: 85 09 A5 09 85 10 C6 10 A5 01 C5 00 F0 03 4C 80
: 03 A4 00 A9 20 F0 06 20 EF FF 88 D0 FA A9 58 20
: EF FF A9 8D 20 EF FF 20 EF FF A5 08 20 DC FF A9
: 8D 20 EF FF 20 EF FF 4C 00 FF ;
300